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30903069 = 310301023
BaseRepresentation
bin111010111100…
…0101100011101
32011011001001010
41311320230131
530402344234
63022205433
7523446261
oct165705435
964131033
1030903069
1116497a2a
12a423879
136530052
1441660a1
152aa66e9
hex1d78b1d

30903069 has 4 divisors (see below), whose sum is σ = 41204096. Its totient is φ = 20602044.

The previous prime is 30903043. The next prime is 30903073. The reversal of 30903069 is 96030903.

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.

It is not a de Polignac number, because 30903069 - 27 = 30902941 is a prime.

It is a super-2 number, since 2×309030692 = 1909999347237522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30903469) 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, 5150509 + ... + 5150514.

It is an arithmetic number, because the mean of its divisors is an integer number (10301024).

Almost surely, 230903069 is an apocalyptic number.

It is an amenable number.

30903069 is a deficient number, since it is larger than the sum of its proper divisors (10301027).

30903069 is a wasteful number, since it uses less digits than its factorization.

30903069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10301026.

The product of its (nonzero) digits is 4374, while the sum is 30.

The square root of 30903069 is about 5559.0528869584. The cubic root of 30903069 is about 313.8103070796.

The spelling of 30903069 in words is "thirty million, nine hundred three thousand, sixty-nine".

Divisors: 1 3 10301023 30903069