654040807 has 4 divisors (see below), whose sum is σ = 747475216. Its totient is φ = 560606400.

The previous prime is 654040769. The next prime is 654040873. The reversal of 654040807 is 708040456.

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 654040807 - 2²⁷ = 519823079 is a prime.

It is a super-2 number, since 2×654040807² = 855538754442422498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654040307) 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, 46717194 + ... + 46717207.

It is an arithmetic number, because the mean of its divisors is an integer number (186868804).

Almost surely, 2^654040807 is an apocalyptic number.

654040807 is a deficient number, since it is larger than the sum of its proper divisors (93434409).

654040807 is an equidigital number, since it uses as much as digits as its factorization.

654040807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93434408.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 654040807 is about 25574.2215326293. The cubic root of 654040807 is about 868.0304266872.

The spelling of 654040807 in words is "six hundred fifty-four million, forty thousand, eight hundred seven".