143696731 has 2 divisors, whose sum is σ = 143696732. Its totient is φ = 143696730.

The previous prime is 143696723. The next prime is 143696737. The reversal of 143696731 is 137696341.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 143696731 - 2³ = 143696723 is a prime.

It is a super-2 number, since 2×143696731² = 41297501000172722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (143696737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71848365 + 71848366.

It is an arithmetic number, because the mean of its divisors is an integer number (71848366).

Almost surely, 2^143696731 is an apocalyptic number.

143696731 is a deficient number, since it is larger than the sum of its proper divisors (1).

143696731 is an equidigital number, since it uses as much as digits as its factorization.

143696731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 40.

The square root of 143696731 is about 11987.3571315783. The cubic root of 143696731 is about 523.7800620700.

The spelling of 143696731 in words is "one hundred forty-three million, six hundred ninety-six thousand, seven hundred thirty-one".