900756891 has 6 divisors (see below), whose sum is σ = 1301093300. Its totient is φ = 600504588.

The previous prime is 900756887. The next prime is 900756893. The reversal of 900756891 is 198657009.

It is not a de Polignac number, because 900756891 - 2² = 900756887 is a prime.

It is a super-2 number, since 2×900756891² = 1622725953367971762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (900756893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50042041 + ... + 50042058.

Almost surely, 2^900756891 is an apocalyptic number.

900756891 is a deficient number, since it is larger than the sum of its proper divisors (400336409).

900756891 is a wasteful number, since it uses less digits than its factorization.

900756891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100084105 (or 100084102 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 900756891 is about 30012.6121988740. The cubic root of 900756891 is about 965.7599644074.

The spelling of 900756891 in words is "nine hundred million, seven hundred fifty-six thousand, eight hundred ninety-one".