653997967 has 8 divisors (see below), whose sum is σ = 748008576. Its totient is φ = 560132952.

The previous prime is 653997947. The next prime is 653997989. The reversal of 653997967 is 769799356.

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 653997967 - 2¹¹ = 653995919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653997947) 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, 26593 + ... + 44890.

It is an arithmetic number, because the mean of its divisors is an integer number (93501072).

Almost surely, 2^653997967 is an apocalyptic number.

653997967 is a deficient number, since it is larger than the sum of its proper divisors (94010609).

653997967 is a wasteful number, since it uses less digits than its factorization.

653997967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72797.

The product of its digits is 19289340, while the sum is 61.

The square root of 653997967 is about 25573.3839567625. The cubic root of 653997967 is about 868.0114741311.

The spelling of 653997967 in words is "six hundred fifty-three million, nine hundred ninety-seven thousand, nine hundred sixty-seven".