978887901 has 8 divisors (see below), whose sum is σ = 1314574240. Its totient is φ = 647896752.

The previous prime is 978887887. The next prime is 978887909. The reversal of 978887901 is 109788879.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 978887901 - 2⁷ = 978887773 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 (978887909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1173310 + ... + 1174143.

It is an arithmetic number, because the mean of its divisors is an integer number (164321780).

Almost surely, 2^978887901 is an apocalyptic number.

It is an amenable number.

978887901 is a deficient number, since it is larger than the sum of its proper divisors (335686339).

978887901 is a wasteful number, since it uses less digits than its factorization.

978887901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2347595.

The product of its (nonzero) digits is 2032128, while the sum is 57.

The square root of 978887901 is about 31287.1842932534. The cubic root of 978887901 is about 992.9125199671.

The spelling of 978887901 in words is "nine hundred seventy-eight million, eight hundred eighty-seven thousand, nine hundred one".