39370421 has 4 divisors (see below), whose sum is σ = 39391872. Its totient is φ = 39348972.

The previous prime is 39370399. The next prime is 39370459. The reversal of 39370421 is 12407393.

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 a de Polignac number, because none of the positive numbers 2^k-39370421 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 (39370481) 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, 7685 + ... + 11738.

It is an arithmetic number, because the mean of its divisors is an integer number (9847968).

Almost surely, 2^39370421 is an apocalyptic number.

It is an amenable number.

39370421 is a deficient number, since it is larger than the sum of its proper divisors (21451).

39370421 is a wasteful number, since it uses less digits than its factorization.

39370421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21450.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 39370421 is about 6274.5853249438. The cubic root of 39370421 is about 340.1914175879.

The spelling of 39370421 in words is "thirty-nine million, three hundred seventy thousand, four hundred twenty-one".