39490961 has 2 divisors, whose sum is σ = 39490962. Its totient is φ = 39490960.

The previous prime is 39490907. The next prime is 39490999. The reversal of 39490961 is 16909493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39450961 + 40000 = 6281^2 + 200^2 .

It is an emirp because it is prime and its reverse (16909493) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39490961 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (39490261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19745480 + 19745481.

It is an arithmetic number, because the mean of its divisors is an integer number (19745481).

Almost surely, 2^39490961 is an apocalyptic number.

It is an amenable number.

39490961 is a deficient number, since it is larger than the sum of its proper divisors (1).

39490961 is an equidigital number, since it uses as much as digits as its factorization.

39490961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 39490961 is about 6284.1833996153. The cubic root of 39490961 is about 340.5382506805.

The spelling of 39490961 in words is "thirty-nine million, four hundred ninety thousand, nine hundred sixty-one".