39699389 has 4 divisors (see below), whose sum is σ = 40372320. Its totient is φ = 39026460.

The previous prime is 39699383. The next prime is 39699391. The reversal of 39699389 is 98399693.

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 39699389 - 2²⁴ = 22922173 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39699383) 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, 336377 + ... + 336494.

It is an arithmetic number, because the mean of its divisors is an integer number (10093080).

Almost surely, 2^39699389 is an apocalyptic number.

It is an amenable number.

39699389 is a deficient number, since it is larger than the sum of its proper divisors (672931).

39699389 is an equidigital number, since it uses as much as digits as its factorization.

39699389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672930.

The product of its digits is 2834352, while the sum is 56.

The square root of 39699389 is about 6300.7451146670. The cubic root of 39699389 is about 341.1363048453.

The spelling of 39699389 in words is "thirty-nine million, six hundred ninety-nine thousand, three hundred eighty-nine".