641456707 has 2 divisors, whose sum is σ = 641456708. Its totient is φ = 641456706.

The previous prime is 641456693. The next prime is 641456719. The reversal of 641456707 is 707654146.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641456707 is a prime.

It is a super-2 number, since 2×641456707² = 822933413910567698, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641456707.

It is not a weakly prime, because it can be changed into another prime (641456797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320728353 + 320728354.

It is an arithmetic number, because the mean of its divisors is an integer number (320728354).

Almost surely, 2^641456707 is an apocalyptic number.

641456707 is a deficient number, since it is larger than the sum of its proper divisors (1).

641456707 is an equidigital number, since it uses as much as digits as its factorization.

641456707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 641456707 is about 25326.9956173250. The cubic root of 641456707 is about 862.4272097641.

The spelling of 641456707 in words is "six hundred forty-one million, four hundred fifty-six thousand, seven hundred seven".