978109051 has 4 divisors (see below), whose sum is σ = 979804792. Its totient is φ = 976413312.

The previous prime is 978109049. The next prime is 978109073. The reversal of 978109051 is 150901879.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 978109051 - 2¹ = 978109049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 978108995 and 978109013.

It is not an unprimeable number, because it can be changed into a prime (978109031) 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, 847005 + ... + 848158.

It is an arithmetic number, because the mean of its divisors is an integer number (244951198).

Almost surely, 2^978109051 is an apocalyptic number.

978109051 is a deficient number, since it is larger than the sum of its proper divisors (1695741).

978109051 is a wasteful number, since it uses less digits than its factorization.

978109051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695740.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 978109051 is about 31274.7350268551. The cubic root of 978109051 is about 992.6491138762.

The spelling of 978109051 in words is "nine hundred seventy-eight million, one hundred nine thousand, fifty-one".