616978367 has 4 divisors (see below), whose sum is σ = 633653496. Its totient is φ = 600303240.

The previous prime is 616978363. The next prime is 616978379. The reversal of 616978367 is 763879616.

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 616978367 - 2² = 616978363 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 (616978361) 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, 8337509 + ... + 8337582.

It is an arithmetic number, because the mean of its divisors is an integer number (158413374).

Almost surely, 2^616978367 is an apocalyptic number.

616978367 is a deficient number, since it is larger than the sum of its proper divisors (16675129).

616978367 is a wasteful number, since it uses less digits than its factorization.

616978367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16675128.

The product of its digits is 2286144, while the sum is 53.

The square root of 616978367 is about 24839.0492370380. The cubic root of 616978367 is about 851.3143987252.

The spelling of 616978367 in words is "six hundred sixteen million, nine hundred seventy-eight thousand, three hundred sixty-seven".