878590949 has 4 divisors (see below), whose sum is σ = 878652864. Its totient is φ = 878529036.

The previous prime is 878590919. The next prime is 878590969. The reversal of 878590949 is 949095878.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 878590949 - 2¹⁶ = 878525413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878590919) 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, 2084 + ... + 41970.

It is an arithmetic number, because the mean of its divisors is an integer number (219663216).

Almost surely, 2^878590949 is an apocalyptic number.

It is an amenable number.

878590949 is a deficient number, since it is larger than the sum of its proper divisors (61915).

878590949 is a wasteful number, since it uses less digits than its factorization.

878590949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61914.

The product of its (nonzero) digits is 6531840, while the sum is 59.

The square root of 878590949 is about 29641.0348840927. The cubic root of 878590949 is about 957.7722319004.

The spelling of 878590949 in words is "eight hundred seventy-eight million, five hundred ninety thousand, nine hundred forty-nine".