654676991 has 8 divisors (see below), whose sum is σ = 684319104. Its totient is φ = 625133080.

The previous prime is 654676973. The next prime is 654676993. The reversal of 654676991 is 199676456.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-654676991 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 (654676993) 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, 10745 + ... + 37746.

It is an arithmetic number, because the mean of its divisors is an integer number (85539888).

Almost surely, 2^654676991 is an apocalyptic number.

654676991 is a deficient number, since it is larger than the sum of its proper divisors (29642113).

654676991 is a wasteful number, since it uses less digits than its factorization.

654676991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49101.

The product of its digits is 2449440, while the sum is 53.

The square root of 654676991 is about 25586.6565029509. The cubic root of 654676991 is about 868.3117792215.

The spelling of 654676991 in words is "six hundred fifty-four million, six hundred seventy-six thousand, nine hundred ninety-one".