641225659 has 2 divisors, whose sum is σ = 641225660. Its totient is φ = 641225658.

The previous prime is 641225633. The next prime is 641225677. The reversal of 641225659 is 956522146.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 641225659 - 2⁹ = 641225147 is a prime.

It is a super-2 number, since 2×641225659² = 822340691519968562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (641225759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320612829 + 320612830.

It is an arithmetic number, because the mean of its divisors is an integer number (320612830).

Almost surely, 2^641225659 is an apocalyptic number.

641225659 is a deficient number, since it is larger than the sum of its proper divisors (1).

641225659 is an equidigital number, since it uses as much as digits as its factorization.

641225659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 40.

The square root of 641225659 is about 25322.4339075058. The cubic root of 641225659 is about 862.3236506780.

The spelling of 641225659 in words is "six hundred forty-one million, two hundred twenty-five thousand, six hundred fifty-nine".