654999983 has 6 divisors (see below), whose sum is σ = 719958792. Its totient is φ = 595454420.

The previous prime is 654999979. The next prime is 654999991. The reversal of 654999983 is 389999456.

It is not a de Polignac number, because 654999983 - 2² = 654999979 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 (654999913) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2706491 + ... + 2706732.

It is an arithmetic number, because the mean of its divisors is an integer number (119993132).

Almost surely, 2^654999983 is an apocalyptic number.

654999983 is a deficient number, since it is larger than the sum of its proper divisors (64958809).

654999983 is a wasteful number, since it uses less digits than its factorization.

654999983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5413245 (or 5413234 counting only the distinct ones).

The product of its digits is 18895680, while the sum is 62.

The square root of 654999983 is about 25592.9674520170. The cubic root of 654999983 is about 868.4545527584.

The spelling of 654999983 in words is "six hundred fifty-four million, nine hundred ninety-nine thousand, nine hundred eighty-three".