431378653 has 2 divisors, whose sum is σ = 431378654. Its totient is φ = 431378652.

The previous prime is 431378611. The next prime is 431378659. The reversal of 431378653 is 356873134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 369331524 + 62047129 = 19218^2 + 7877^2 .

It is a cyclic number.

It is not a de Polignac number, because 431378653 - 2¹⁷ = 431247581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431378659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215689326 + 215689327.

It is an arithmetic number, because the mean of its divisors is an integer number (215689327).

Almost surely, 2^431378653 is an apocalyptic number.

It is an amenable number.

431378653 is a deficient number, since it is larger than the sum of its proper divisors (1).

431378653 is an equidigital number, since it uses as much as digits as its factorization.

431378653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 40.

The square root of 431378653 is about 20769.6570265375. The cubic root of 431378653 is about 755.5900263308.

The spelling of 431378653 in words is "four hundred thirty-one million, three hundred seventy-eight thousand, six hundred fifty-three".