39421313 has 4 divisors (see below), whose sum is σ = 39464148. Its totient is φ = 39378480.

The previous prime is 39421309. The next prime is 39421321. The reversal of 39421313 is 31312493.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30558784 + 8862529 = 5528^2 + 2977^2 .

It is a cyclic number.

It is not a de Polignac number, because 39421313 - 2² = 39421309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39421363) 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, 20006 + ... + 21887.

It is an arithmetic number, because the mean of its divisors is an integer number (9866037).

Almost surely, 2^39421313 is an apocalyptic number.

It is an amenable number.

39421313 is a deficient number, since it is larger than the sum of its proper divisors (42835).

39421313 is an equidigital number, since it uses as much as digits as its factorization.

39421313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42834.

The product of its digits is 1944, while the sum is 26.

The square root of 39421313 is about 6278.6394226775. The cubic root of 39421313 is about 340.3379367823.

The spelling of 39421313 in words is "thirty-nine million, four hundred twenty-one thousand, three hundred thirteen".