6349977901 has 2 divisors, whose sum is σ = 6349977902. Its totient is φ = 6349977900.

The previous prime is 6349977899. The next prime is 6349977919. The reversal of 6349977901 is 1097799436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5063034025 + 1286943876 = 71155^2 + 35874^2 .

It is a cyclic number.

It is not a de Polignac number, because 6349977901 - 2¹ = 6349977899 is a prime.

Together with 6349977899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6349977971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3174988950 + 3174988951.

It is an arithmetic number, because the mean of its divisors is an integer number (3174988951).

Almost surely, 2^6349977901 is an apocalyptic number.

It is an amenable number.

6349977901 is a deficient number, since it is larger than the sum of its proper divisors (1).

6349977901 is an equidigital number, since it uses as much as digits as its factorization.

6349977901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2571912, while the sum is 55.

The square root of 6349977901 is about 79686.7485909671. The cubic root of 6349977901 is about 1851.7857508524.

The spelling of 6349977901 in words is "six billion, three hundred forty-nine million, nine hundred seventy-seven thousand, nine hundred one".