431101387 has 2 divisors, whose sum is σ = 431101388. Its totient is φ = 431101386.

The previous prime is 431101357. The next prime is 431101409. The reversal of 431101387 is 783101134.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431101387 is a prime.

It is not a weakly prime, because it can be changed into another prime (431101357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215550693 + 215550694.

It is an arithmetic number, because the mean of its divisors is an integer number (215550694).

Almost surely, 2^431101387 is an apocalyptic number.

431101387 is a deficient number, since it is larger than the sum of its proper divisors (1).

431101387 is an equidigital number, since it uses as much as digits as its factorization.

431101387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 431101387 is about 20762.9811684161. The cubic root of 431101387 is about 755.4281080072.

The spelling of 431101387 in words is "four hundred thirty-one million, one hundred one thousand, three hundred eighty-seven".