641197799 has 4 divisors (see below), whose sum is σ = 699488520. Its totient is φ = 582907080.

The previous prime is 641197787. The next prime is 641197847. The reversal of 641197799 is 997791146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 641197799 - 2⁴ = 641197783 is a prime.

It is a super-2 number, since 2×641197799² = 822269234884888802, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 641197799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641197099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29145344 + ... + 29145365.

It is an arithmetic number, because the mean of its divisors is an integer number (174872130).

Almost surely, 2^641197799 is an apocalyptic number.

641197799 is a deficient number, since it is larger than the sum of its proper divisors (58290721).

641197799 is a wasteful number, since it uses less digits than its factorization.

641197799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58290720.

The product of its digits is 857304, while the sum is 53.

The square root of 641197799 is about 25321.8837964319. The cubic root of 641197799 is about 862.3111617388.

The spelling of 641197799 in words is "six hundred forty-one million, one hundred ninety-seven thousand, seven hundred ninety-nine".