641046137 has 4 divisors (see below), whose sum is σ = 644751780. Its totient is φ = 637340496.

The previous prime is 641046121. The next prime is 641046167. The reversal of 641046137 is 731640146.

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

It can be written as a sum of positive squares in 2 ways, for example, as 326019136 + 315027001 = 18056^2 + 17749^2 .

It is a cyclic number.

It is not a de Polignac number, because 641046137 - 2⁴ = 641046121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641046167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1852562 + ... + 1852907.

It is an arithmetic number, because the mean of its divisors is an integer number (161187945).

Almost surely, 2^641046137 is an apocalyptic number.

It is an amenable number.

641046137 is a deficient number, since it is larger than the sum of its proper divisors (3705643).

641046137 is a wasteful number, since it uses less digits than its factorization.

641046137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3705642.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 641046137 is about 25318.8889369182. Note that the first 3 decimals coincide. The cubic root of 641046137 is about 862.2431691225.

The spelling of 641046137 in words is "six hundred forty-one million, forty-six thousand, one hundred thirty-seven".