641003977 has 2 divisors, whose sum is σ = 641003978. Its totient is φ = 641003976.

The previous prime is 641003971. The next prime is 641003983. The reversal of 641003977 is 779300146.

641003977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (641003971) and next prime (641003983).

It can be written as a sum of positive squares in only one way, i.e., 608559561 + 32444416 = 24669^2 + 5696^2 .

It is a cyclic number.

It is not a de Polignac number, because 641003977 - 2¹¹ = 641001929 is a prime.

It is not a weakly prime, because it can be changed into another prime (641003971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320501988 + 320501989.

It is an arithmetic number, because the mean of its divisors is an integer number (320501989).

Almost surely, 2^641003977 is an apocalyptic number.

It is an amenable number.

641003977 is a deficient number, since it is larger than the sum of its proper divisors (1).

641003977 is an equidigital number, since it uses as much as digits as its factorization.

641003977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 641003977 is about 25318.0563432504. The cubic root of 641003977 is about 862.2242661830.

The spelling of 641003977 in words is "six hundred forty-one million, three thousand, nine hundred seventy-seven".