1431331723 has 4 divisors (see below), whose sum is σ = 1431872680. Its totient is φ = 1430790768.

The previous prime is 1431331691. The next prime is 1431331729. The reversal of 1431331723 is 3271331341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3271331341 = 29 ⋅112804529.

It is a cyclic number.

It is not a de Polignac number, because 1431331723 - 2⁵ = 1431331691 is a prime.

It is a super-2 number, since 2×1431331723² = 4097421002532297458, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1431331691 and 1431331700.

It is not an unprimeable number, because it can be changed into a prime (1431331729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266490 + ... + 271807.

It is an arithmetic number, because the mean of its divisors is an integer number (357968170).

Almost surely, 2^1431331723 is an apocalyptic number.

1431331723 is a deficient number, since it is larger than the sum of its proper divisors (540957).

1431331723 is an equidigital number, since it uses as much as digits as its factorization.

1431331723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540956.

The product of its digits is 4536, while the sum is 28.

The square root of 1431331723 is about 37832.9449422061. The cubic root of 1431331723 is about 1126.9727947575.

The spelling of 1431331723 in words is "one billion, four hundred thirty-one million, three hundred thirty-one thousand, seven hundred twenty-three".