140672431 has 2 divisors, whose sum is σ = 140672432. Its totient is φ = 140672430.

The previous prime is 140672419. The next prime is 140672459. The reversal of 140672431 is 134276041.

It is an a-pointer prime, because the next prime (140672459) can be obtained adding 140672431 to its sum of digits (28).

It is a weak prime.

It is an emirp because it is prime and its reverse (134276041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140672431 - 2⁷ = 140672303 is a prime.

It is a super-2 number, since 2×140672431² = 39577465686899522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 140672431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140652431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70336215 + 70336216.

It is an arithmetic number, because the mean of its divisors is an integer number (70336216).

Almost surely, 2^140672431 is an apocalyptic number.

140672431 is a deficient number, since it is larger than the sum of its proper divisors (1).

140672431 is an equidigital number, since it uses as much as digits as its factorization.

140672431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 140672431 is about 11860.5409235835. The cubic root of 140672431 is about 520.0794146463.

It can be divided in two parts, 1406 and 72431, that added together give a palindrome (73837).

The spelling of 140672431 in words is "one hundred forty million, six hundred seventy-two thousand, four hundred thirty-one".