7639873 has 2 divisors, whose sum is σ = 7639874. Its totient is φ = 7639872.

The previous prime is 7639859. The next prime is 7639883. The reversal of 7639873 is 3789367.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7219969 + 419904 = 2687^2 + 648^2 .

It is an emirp because it is prime and its reverse (3789367) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7639873 - 2¹⁷ = 7508801 is a prime.

It is a super-2 number, since 2×7639873² = 116735318912258, which contains 22 as substring.

It is an Ulam number.

It is a d-powerful number, because it can be written as 7² + 6⁷ + 3⁵ + 9 + 8³ + 7⁸ + 3¹³ .

It is not a weakly prime, because it can be changed into another prime (7639883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3819936 + 3819937.

It is an arithmetic number, because the mean of its divisors is an integer number (3819937).

Almost surely, 2^7639873 is an apocalyptic number.

It is an amenable number.

7639873 is a deficient number, since it is larger than the sum of its proper divisors (1).

7639873 is an equidigital number, since it uses as much as digits as its factorization.

7639873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 43.

The square root of 7639873 is about 2764.0320186279. The cubic root of 7639873 is about 196.9527487661.

The spelling of 7639873 in words is "seven million, six hundred thirty-nine thousand, eight hundred seventy-three".