900879949 has 2 divisors, whose sum is σ = 900879950. Its totient is φ = 900879948.

The previous prime is 900879919. The next prime is 900879977. The reversal of 900879949 is 949978009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 463024324 + 437855625 = 21518^2 + 20925^2 .

It is a cyclic number.

It is not a de Polignac number, because 900879949 - 2²⁵ = 867325517 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 900879949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (900879919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450439974 + 450439975.

It is an arithmetic number, because the mean of its divisors is an integer number (450439975).

Almost surely, 2^900879949 is an apocalyptic number.

It is an amenable number.

900879949 is a deficient number, since it is larger than the sum of its proper divisors (1).

900879949 is an equidigital number, since it uses as much as digits as its factorization.

900879949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 55.

The square root of 900879949 is about 30014.6622336484. The cubic root of 900879949 is about 965.8039418961.

The spelling of 900879949 in words is "nine hundred million, eight hundred seventy-nine thousand, nine hundred forty-nine".