39327990649 has 2 divisors, whose sum is σ = 39327990650. Its totient is φ = 39327990648.

The previous prime is 39327990641. The next prime is 39327990659. The reversal of 39327990649 is 94609972393.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29513522025 + 9814468624 = 171795^2 + 99068^2 .

It is a cyclic number.

It is not a de Polignac number, because 39327990649 - 2³ = 39327990641 is a prime.

It is not a weakly prime, because it can be changed into another prime (39327990641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19663995324 + 19663995325.

It is an arithmetic number, because the mean of its divisors is an integer number (19663995325).

Almost surely, 2^39327990649 is an apocalyptic number.

It is an amenable number.

39327990649 is a deficient number, since it is larger than the sum of its proper divisors (1).

39327990649 is an equidigital number, since it uses as much as digits as its factorization.

39327990649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19840464, while the sum is 61.

The spelling of 39327990649 in words is "thirty-nine billion, three hundred twenty-seven million, nine hundred ninety thousand, six hundred forty-nine".