641276139 has 8 divisors (see below), whose sum is σ = 977182720. Its totient is φ = 366443496.

The previous prime is 641276113. The next prime is 641276143. The reversal of 641276139 is 931672146.

641276139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 641276139 - 2¹² = 641272043 is a prime.

It is a super-2 number, since 2×641276139² = 822470172901494642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 641276097 and 641276106.

It is not an unprimeable number, because it can be changed into a prime (641276149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15268459 + ... + 15268500.

It is an arithmetic number, because the mean of its divisors is an integer number (122147840).

Almost surely, 2^641276139 is an apocalyptic number.

641276139 is a deficient number, since it is larger than the sum of its proper divisors (335906581).

641276139 is a wasteful number, since it uses less digits than its factorization.

641276139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30536969.

The product of its digits is 54432, while the sum is 39.

The square root of 641276139 is about 25323.4306325190. The cubic root of 641276139 is about 862.3462786744.

The spelling of 641276139 in words is "six hundred forty-one million, two hundred seventy-six thousand, one hundred thirty-nine".