39404969 has 4 divisors (see below), whose sum is σ = 39466896. Its totient is φ = 39343044.

The previous prime is 39404927. The next prime is 39404983. The reversal of 39404969 is 96940493.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 39404969 - 2¹² = 39400873 is a prime.

It is a super-2 number, since 2×39404969² = 3105503163781922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39404909) 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, 29999 + ... + 31284.

It is an arithmetic number, because the mean of its divisors is an integer number (9866724).

Almost surely, 2^39404969 is an apocalyptic number.

It is an amenable number.

39404969 is a deficient number, since it is larger than the sum of its proper divisors (61927).

39404969 is an equidigital number, since it uses as much as digits as its factorization.

39404969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61926.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 39404969 is about 6277.3377318733. The cubic root of 39404969 is about 340.2908957976.

The spelling of 39404969 in words is "thirty-nine million, four hundred four thousand, nine hundred sixty-nine".