140791531 has 2 divisors, whose sum is σ = 140791532. Its totient is φ = 140791530.

The previous prime is 140791513. The next prime is 140791561. The reversal of 140791531 is 135197041.

140791531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (140791513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140791531 - 2⁹ = 140791019 is a prime.

It is a super-2 number, since 2×140791531² = 39644510402647922, which contains 22 as substring.

It is equal to p_7954312 and since 140791531 and 7954312 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 140791493 and 140791502.

It is not a weakly prime, because it can be changed into another prime (140791561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70395765 + 70395766.

It is an arithmetic number, because the mean of its divisors is an integer number (70395766).

Almost surely, 2^140791531 is an apocalyptic number.

140791531 is a deficient number, since it is larger than the sum of its proper divisors (1).

140791531 is an equidigital number, since it uses as much as digits as its factorization.

140791531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 140791531 is about 11865.5607115720. The cubic root of 140791531 is about 520.2261479358.

The spelling of 140791531 in words is "one hundred forty million, seven hundred ninety-one thousand, five hundred thirty-one".