654345431 has 4 divisors (see below), whose sum is σ = 654465000. Its totient is φ = 654225864.

The previous prime is 654345403. The next prime is 654345437. The reversal of 654345431 is 134543456.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-654345431 is a prime.

It is a super-2 number, since 2×654345431² = 856335886141151522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 654345391 and 654345400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654345437) 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, 51161 + ... + 62658.

It is an arithmetic number, because the mean of its divisors is an integer number (163616250).

Almost surely, 2^654345431 is an apocalyptic number.

654345431 is a deficient number, since it is larger than the sum of its proper divisors (119569).

654345431 is a wasteful number, since it uses less digits than its factorization.

654345431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119568.

The product of its digits is 86400, while the sum is 35.

The square root of 654345431 is about 25580.1765240195. The cubic root of 654345431 is about 868.1651694822.

Adding to 654345431 its reverse (134543456), we get a palindrome (788888887).

The spelling of 654345431 in words is "six hundred fifty-four million, three hundred forty-five thousand, four hundred thirty-one".