39679389 has 10 divisors (see below), whose sum is σ = 59274270. Its totient is φ = 26452872.

The previous prime is 39679331. The next prime is 39679397. The reversal of 39679389 is 98397693.

It can be written as a sum of positive squares in only one way, i.e., 32867289 + 6812100 = 5733^2 + 2610^2 .

It is not a de Polignac number, because 39679389 - 2¹⁶ = 39613853 is a prime.

It is a super-2 number, since 2×39679389² = 3148907822826642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39679399) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 244854 + ... + 245015.

It is an arithmetic number, because the mean of its divisors is an integer number (5927427).

Almost surely, 2^39679389 is an apocalyptic number.

It is an amenable number.

39679389 is a deficient number, since it is larger than the sum of its proper divisors (19594881).

39679389 is an equidigital number, since it uses as much as digits as its factorization.

39679389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489881 (or 489872 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 54.

The square root of 39679389 is about 6299.1578008493. The cubic root of 39679389 is about 341.0790086473.

The spelling of 39679389 in words is "thirty-nine million, six hundred seventy-nine thousand, three hundred eighty-nine".