39913493 has 2 divisors, whose sum is σ = 39913494. Its totient is φ = 39913492.

The previous prime is 39913477. The next prime is 39913499. The reversal of 39913493 is 39431993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31281649 + 8631844 = 5593^2 + 2938^2 .

It is a cyclic number.

It is not a de Polignac number, because 39913493 - 2⁴ = 39913477 is a prime.

It is a super-2 number, since 2×39913493² = 3186173846922098, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39913493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39913499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19956746 + 19956747.

It is an arithmetic number, because the mean of its divisors is an integer number (19956747).

Almost surely, 2^39913493 is an apocalyptic number.

It is an amenable number.

39913493 is a deficient number, since it is larger than the sum of its proper divisors (1).

39913493 is an equidigital number, since it uses as much as digits as its factorization.

39913493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78732, while the sum is 41.

The square root of 39913493 is about 6317.7126398721. The cubic root of 39913493 is about 341.7484699098.

The spelling of 39913493 in words is "thirty-nine million, nine hundred thirteen thousand, four hundred ninety-three".