1431739397 has 16 divisors (see below), whose sum is σ = 1643310720. Its totient is φ = 1244964160.

The previous prime is 1431739381. The next prime is 1431739411. The reversal of 1431739397 is 7939371341.

It is not a de Polignac number, because 1431739397 - 2⁴ = 1431739381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431739327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7229 + ... + 53997.

It is an arithmetic number, because the mean of its divisors is an integer number (102706920).

Almost surely, 2^1431739397 is an apocalyptic number.

It is an amenable number.

1431739397 is a deficient number, since it is larger than the sum of its proper divisors (211571323).

1431739397 is an equidigital number, since it uses as much as digits as its factorization.

1431739397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46825 (or 46803 counting only the distinct ones).

The product of its digits is 428652, while the sum is 47.

The square root of 1431739397 is about 37838.3323760443. The cubic root of 1431739397 is about 1127.0797799489.

The spelling of 1431739397 in words is "one billion, four hundred thirty-one million, seven hundred thirty-nine thousand, three hundred ninety-seven".