431215973 has 2 divisors, whose sum is σ = 431215974. Its totient is φ = 431215972.

The previous prime is 431215957. The next prime is 431215979. The reversal of 431215973 is 379512134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 430064644 + 1151329 = 20738^2 + 1073^2 .

It is a cyclic number.

It is not a de Polignac number, because 431215973 - 2⁴ = 431215957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431215979) 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 as a sum of consecutive naturals, namely, 215607986 + 215607987.

It is an arithmetic number, because the mean of its divisors is an integer number (215607987).

Almost surely, 2^431215973 is an apocalyptic number.

It is an amenable number.

431215973 is a deficient number, since it is larger than the sum of its proper divisors (1).

431215973 is an equidigital number, since it uses as much as digits as its factorization.

431215973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 35.

The square root of 431215973 is about 20765.7403672491. The cubic root of 431215973 is about 755.4950325711.

It can be divided in two parts, 43121 and 5973, that added together give a palindrome (49094).

The spelling of 431215973 in words is "four hundred thirty-one million, two hundred fifteen thousand, nine hundred seventy-three".