654707381 has 4 divisors (see below), whose sum is σ = 656109792. Its totient is φ = 653304972.

The previous prime is 654707369. The next prime is 654707387. The reversal of 654707381 is 183707456.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-654707381 is a prime.

It is a super-2 number, since 2×654707381² = 857283509471758322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654707387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 700505 + ... + 701438.

It is an arithmetic number, because the mean of its divisors is an integer number (164027448).

Almost surely, 2^654707381 is an apocalyptic number.

It is an amenable number.

654707381 is a deficient number, since it is larger than the sum of its proper divisors (1402411).

654707381 is a wasteful number, since it uses less digits than its factorization.

654707381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402410.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 654707381 is about 25587.2503602869. The cubic root of 654707381 is about 868.3252146444.

The spelling of 654707381 in words is "six hundred fifty-four million, seven hundred seven thousand, three hundred eighty-one".