39890737 has 2 divisors, whose sum is σ = 39890738. Its totient is φ = 39890736.

The previous prime is 39890693. The next prime is 39890743. The reversal of 39890737 is 73709893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32251041 + 7639696 = 5679^2 + 2764^2 .

It is a cyclic number.

It is not a de Polignac number, because 39890737 - 2¹¹ = 39888689 is a prime.

It is not a weakly prime, because it can be changed into another prime (39890797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19945368 + 19945369.

It is an arithmetic number, because the mean of its divisors is an integer number (19945369).

Almost surely, 2^39890737 is an apocalyptic number.

It is an amenable number.

39890737 is a deficient number, since it is larger than the sum of its proper divisors (1).

39890737 is an equidigital number, since it uses as much as digits as its factorization.

39890737 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 285768, while the sum is 46.

The square root of 39890737 is about 6315.9114148316. The cubic root of 39890737 is about 341.6835102014.

The spelling of 39890737 in words is "thirty-nine million, eight hundred ninety thousand, seven hundred thirty-seven".