653445431 has 4 divisors (see below), whose sum is σ = 654434664. Its totient is φ = 652456200.

The previous prime is 653445421. The next prime is 653445451. The reversal of 653445431 is 134544356.

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 653445431 - 2⁶ = 653445367 is a prime.

It is a super-2 number, since 2×653445431² = 853981862589551522, 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 = 653445391 and 653445400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653445421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 493625 + ... + 494946.

It is an arithmetic number, because the mean of its divisors is an integer number (163608666).

Almost surely, 2^653445431 is an apocalyptic number.

653445431 is a deficient number, since it is larger than the sum of its proper divisors (989233).

653445431 is an equidigital number, since it uses as much as digits as its factorization.

653445431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989232.

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

The square root of 653445431 is about 25562.5787235952. The cubic root of 653445431 is about 867.7669561853.

Adding to 653445431 its reverse (134544356), we get a palindrome (787989787).

The spelling of 653445431 in words is "six hundred fifty-three million, four hundred forty-five thousand, four hundred thirty-one".