100649291 has 4 divisors (see below), whose sum is σ = 100735272. Its totient is φ = 100563312.

The previous prime is 100649273. The next prime is 100649293. The reversal of 100649291 is 192946001.

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

It is a cyclic number.

It is not a de Polignac number, because 100649291 - 2²⁶ = 33540427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100649293) 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, 41210 + ... + 43583.

It is an arithmetic number, because the mean of its divisors is an integer number (25183818).

Almost surely, 2^100649291 is an apocalyptic number.

100649291 is a deficient number, since it is larger than the sum of its proper divisors (85981).

100649291 is an equidigital number, since it uses as much as digits as its factorization.

100649291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85980.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 100649291 is about 10032.4120230381. The cubic root of 100649291 is about 465.1612975715.

The spelling of 100649291 in words is "one hundred million, six hundred forty-nine thousand, two hundred ninety-one".