38979769 has 2 divisors, whose sum is σ = 38979770. Its totient is φ = 38979768.

The previous prime is 38979763. The next prime is 38979821. The reversal of 38979769 is 96797983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23863225 + 15116544 = 4885^2 + 3888^2 .

It is a cyclic number.

It is not a de Polignac number, because 38979769 - 2⁹ = 38979257 is a prime.

It is a super-2 number, since 2×38979769² = 3038844782586722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (38979763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19489884 + 19489885.

It is an arithmetic number, because the mean of its divisors is an integer number (19489885).

Almost surely, 2^38979769 is an apocalyptic number.

It is an amenable number.

38979769 is a deficient number, since it is larger than the sum of its proper divisors (1).

38979769 is an equidigital number, since it uses as much as digits as its factorization.

38979769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5143824, while the sum is 58.

The square root of 38979769 is about 6243.3780119419. The cubic root of 38979769 is about 339.0624951857.

The spelling of 38979769 in words is "thirty-eight million, nine hundred seventy-nine thousand, seven hundred sixty-nine".