641144039 has 2 divisors, whose sum is σ = 641144040. Its totient is φ = 641144038.

The previous prime is 641144027. The next prime is 641144047. The reversal of 641144039 is 930441146.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641144039 is a prime.

It is a super-2 number, since 2×641144039² = 822131357490467042, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 641143996 and 641144014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641144059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320572019 + 320572020.

It is an arithmetic number, because the mean of its divisors is an integer number (320572020).

Almost surely, 2^641144039 is an apocalyptic number.

641144039 is a deficient number, since it is larger than the sum of its proper divisors (1).

641144039 is an equidigital number, since it uses as much as digits as its factorization.

641144039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 641144039 is about 25320.8222417835. The cubic root of 641144039 is about 862.2870614566.

The spelling of 641144039 in words is "six hundred forty-one million, one hundred forty-four thousand, thirty-nine".