641354679 has 30 divisors (see below), whose sum is σ = 1114500024. Its totient is φ = 366486120.

The previous prime is 641354669. The next prime is 641354687. The reversal of 641354679 is 976453146.

It is not a de Polignac number, because 641354679 - 2¹⁷ = 641223607 is a prime.

It is a super-2 number, since 2×641354679² = 822671648550386082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641354639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 76827 + ... + 84764.

Almost surely, 2^641354679 is an apocalyptic number.

641354679 is a deficient number, since it is larger than the sum of its proper divisors (473145345).

641354679 is a wasteful number, since it uses less digits than its factorization.

641354679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161617 (or 161601 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 641354679 is about 25324.9813227967. The cubic root of 641354679 is about 862.3814823918.

The spelling of 641354679 in words is "six hundred forty-one million, three hundred fifty-four thousand, six hundred seventy-nine".