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7972853 = 71138979
BaseRepresentation
bin11110011010011111110101
3120000001200212
4132122133311
54020112403
6442515205
7124524320
oct36323765
916001625
107972853
114556139
122805b05
131861c85
1410b77b7
15a774d8
hex79a7f5

7972853 has 4 divisors (see below), whose sum is σ = 9111840. Its totient is φ = 6833868.

The previous prime is 7972849. The next prime is 7972879. The reversal of 7972853 is 3582797.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3582797 = 12728211.

It is a cyclic number.

It is not a de Polignac number, because 7972853 - 22 = 7972849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7972853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7972253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 569483 + ... + 569496.

It is an arithmetic number, because the mean of its divisors is an integer number (2277960).

Almost surely, 27972853 is an apocalyptic number.

It is an amenable number.

7972853 is a deficient number, since it is larger than the sum of its proper divisors (1138987).

7972853 is a wasteful number, since it uses less digits than its factorization.

7972853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138986.

The product of its digits is 105840, while the sum is 41.

The square root of 7972853 is about 2823.6240897117. The cubic root of 7972853 is about 199.7735186277.

The spelling of 7972853 in words is "seven million, nine hundred seventy-two thousand, eight hundred fifty-three".

Divisors: 1 7 1138979 7972853