39494731 has 2 divisors, whose sum is σ = 39494732. Its totient is φ = 39494730.

The previous prime is 39494717. The next prime is 39494747. The reversal of 39494731 is 13749493.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39494731 - 2⁹ = 39494219 is a prime.

It is a super-2 number, since 2×39494731² = 3119667553524722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (39494761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19747365 + 19747366.

It is an arithmetic number, because the mean of its divisors is an integer number (19747366).

Almost surely, 2^39494731 is an apocalyptic number.

39494731 is a deficient number, since it is larger than the sum of its proper divisors (1).

39494731 is an equidigital number, since it uses as much as digits as its factorization.

39494731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 40.

The square root of 39494731 is about 6284.4833518755. The cubic root of 39494731 is about 340.5490868172.

The spelling of 39494731 in words is "thirty-nine million, four hundred ninety-four thousand, seven hundred thirty-one".