100644257 has 8 divisors (see below), whose sum is σ = 115568832. Its totient is φ = 85856400.

The previous prime is 100644163. The next prime is 100644263. The reversal of 100644257 is 752446001.

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

It is not a de Polignac number, because 100644257 - 2¹⁶ = 100578721 is a prime.

It is a super-3 number, since 3×100644257³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100644277) 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, 32594 + ... + 35547.

It is an arithmetic number, because the mean of its divisors is an integer number (14446104).

Almost surely, 2^100644257 is an apocalyptic number.

It is an amenable number.

100644257 is a deficient number, since it is larger than the sum of its proper divisors (14924575).

100644257 is an equidigital number, since it uses as much as digits as its factorization.

100644257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68359.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 100644257 is about 10032.1611330760. The cubic root of 100644257 is about 465.1535423885.

The spelling of 100644257 in words is "one hundred million, six hundred forty-four thousand, two hundred fifty-seven".