978369617 has 4 divisors (see below), whose sum is σ = 983775156. Its totient is φ = 972964080.

The previous prime is 978369589. The next prime is 978369631. The reversal of 978369617 is 716963879.

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

It can be written as a sum of positive squares in 2 ways, for example, as 163609681 + 814759936 = 12791^2 + 28544^2 .

It is a cyclic number.

It is not a de Polignac number, because 978369617 - 2¹⁶ = 978304081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978369677) 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, 2702498 + ... + 2702859.

It is an arithmetic number, because the mean of its divisors is an integer number (245943789).

Almost surely, 2^978369617 is an apocalyptic number.

It is an amenable number.

978369617 is a deficient number, since it is larger than the sum of its proper divisors (5405539).

978369617 is a wasteful number, since it uses less digits than its factorization.

978369617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5405538.

The product of its digits is 3429216, while the sum is 56.

The square root of 978369617 is about 31278.9005081700. The cubic root of 978369617 is about 992.7372525298.

The spelling of 978369617 in words is "nine hundred seventy-eight million, three hundred sixty-nine thousand, six hundred seventeen".