140987631 has 16 divisors (see below), whose sum is σ = 199090944. Its totient is φ = 88560384.

The previous prime is 140987629. The next prime is 140987689. The reversal of 140987631 is 136789041.

It is not a de Polignac number, because 140987631 - 2¹ = 140987629 is a prime.

It is a super-2 number, since 2×140987631² = 39755024189984322, 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 140987631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140983631) 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, 10626 + ... + 19871.

It is an arithmetic number, because the mean of its divisors is an integer number (12443184).

Almost surely, 2^140987631 is an apocalyptic number.

140987631 is a deficient number, since it is larger than the sum of its proper divisors (58103313).

140987631 is a wasteful number, since it uses less digits than its factorization.

140987631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30590.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 140987631 is about 11873.8212467596. The cubic root of 140987631 is about 520.4675663871.

The spelling of 140987631 in words is "one hundred forty million, nine hundred eighty-seven thousand, six hundred thirty-one".