900978913 has 4 divisors (see below), whose sum is σ = 901144768. Its totient is φ = 900813060.

The previous prime is 900978877. The next prime is 900978961. The reversal of 900978913 is 319879009.

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 900978913 - 2¹⁷ = 900847841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (900978973) 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 3 ways as a sum of consecutive naturals, for example, 74493 + ... + 85738.

It is an arithmetic number, because the mean of its divisors is an integer number (225286192).

Almost surely, 2^900978913 is an apocalyptic number.

It is an amenable number.

900978913 is a deficient number, since it is larger than the sum of its proper divisors (165855).

900978913 is a wasteful number, since it uses less digits than its factorization.

900978913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165854.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 900978913 is about 30016.3107826395. The cubic root of 900978913 is about 965.8393059575.

The spelling of 900978913 in words is "nine hundred million, nine hundred seventy-eight thousand, nine hundred thirteen".