978073651 has 4 divisors (see below), whose sum is σ = 1004508112. Its totient is φ = 951639192.

The previous prime is 978073589. The next prime is 978073661. The reversal of 978073651 is 156370879.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-978073651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978073661) 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, 13217175 + ... + 13217248.

It is an arithmetic number, because the mean of its divisors is an integer number (251127028).

Almost surely, 2^978073651 is an apocalyptic number.

978073651 is a deficient number, since it is larger than the sum of its proper divisors (26434461).

978073651 is a wasteful number, since it uses less digits than its factorization.

978073651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26434460.

The product of its (nonzero) digits is 317520, while the sum is 46.

The square root of 978073651 is about 31274.1690696971. The cubic root of 978073651 is about 992.6371383190.

The spelling of 978073651 in words is "nine hundred seventy-eight million, seventy-three thousand, six hundred fifty-one".