431978467 has 2 divisors, whose sum is σ = 431978468. Its totient is φ = 431978466.

The previous prime is 431978389. The next prime is 431978507. The reversal of 431978467 is 764879134.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431978467 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 431978467.

It is not a weakly prime, because it can be changed into another prime (431979467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215989233 + 215989234.

It is an arithmetic number, because the mean of its divisors is an integer number (215989234).

Almost surely, 2^431978467 is an apocalyptic number.

431978467 is a deficient number, since it is larger than the sum of its proper divisors (1).

431978467 is an equidigital number, since it uses as much as digits as its factorization.

431978467 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 49.

The square root of 431978467 is about 20784.0916808986. The cubic root of 431978467 is about 755.9400695986.

The spelling of 431978467 in words is "four hundred thirty-one million, nine hundred seventy-eight thousand, four hundred sixty-seven".