978566131 has 8 divisors (see below), whose sum is σ = 981528624. Its totient is φ = 975609600.

The previous prime is 978566129. The next prime is 978566143. The reversal of 978566131 is 131665879.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 978566131 - 2¹ = 978566129 is a prime.

It is a super-2 number, since 2×978566131² = 1915183345480618322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978566161) 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, 930556 + ... + 931606.

It is an arithmetic number, because the mean of its divisors is an integer number (122691078).

Almost surely, 2^978566131 is an apocalyptic number.

978566131 is a deficient number, since it is larger than the sum of its proper divisors (2962493).

978566131 is a wasteful number, since it uses less digits than its factorization.

978566131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2981.

The product of its digits is 272160, while the sum is 46.

The square root of 978566131 is about 31282.0416693029. The cubic root of 978566131 is about 992.8037147014.

The spelling of 978566131 in words is "nine hundred seventy-eight million, five hundred sixty-six thousand, one hundred thirty-one".