100490857 has 4 divisors (see below), whose sum is σ = 100933776. Its totient is φ = 100047940.

The previous prime is 100490827. The next prime is 100490881. The reversal of 100490857 is 758094001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100490857 - 2¹¹ = 100488809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100490807) 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, 221119 + ... + 221572.

It is an arithmetic number, because the mean of its divisors is an integer number (25233444).

Almost surely, 2^100490857 is an apocalyptic number.

It is an amenable number.

100490857 is a deficient number, since it is larger than the sum of its proper divisors (442919).

100490857 is an equidigital number, since it uses as much as digits as its factorization.

100490857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442918.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 100490857 is about 10024.5128061168. The cubic root of 100490857 is about 464.9170962542.

The spelling of 100490857 in words is "one hundred million, four hundred ninety thousand, eight hundred fifty-seven".