39641228929 has 2 divisors, whose sum is σ = 39641228930. Its totient is φ = 39641228928.

The previous prime is 39641228897. The next prime is 39641228959. The reversal of 39641228929 is 92982214693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39274123329 + 367105600 = 198177^2 + 19160^2 .

It is a cyclic number.

It is not a de Polignac number, because 39641228929 - 2⁵ = 39641228897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39641228929.

It is not a weakly prime, because it can be changed into another prime (39641228959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19820614464 + 19820614465.

It is an arithmetic number, because the mean of its divisors is an integer number (19820614465).

Almost surely, 2^39641228929 is an apocalyptic number.

It is an amenable number.

39641228929 is a deficient number, since it is larger than the sum of its proper divisors (1).

39641228929 is an equidigital number, since it uses as much as digits as its factorization.

39641228929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3359232, while the sum is 55.

The spelling of 39641228929 in words is "thirty-nine billion, six hundred forty-one million, two hundred twenty-eight thousand, nine hundred twenty-nine".