140019931 has 2 divisors, whose sum is σ = 140019932. Its totient is φ = 140019930.

The previous prime is 140019907. The next prime is 140019941. The reversal of 140019931 is 139910041.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140019931 - 2¹¹ = 140017883 is a prime.

It is a super-2 number, since 2×140019931² = 39211162154489522, 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 140019931.

It is not a weakly prime, because it can be changed into another prime (140019941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70009965 + 70009966.

It is an arithmetic number, because the mean of its divisors is an integer number (70009966).

Almost surely, 2^140019931 is an apocalyptic number.

140019931 is a deficient number, since it is larger than the sum of its proper divisors (1).

140019931 is an equidigital number, since it uses as much as digits as its factorization.

140019931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 140019931 is about 11833.0017746977. The cubic root of 140019931 is about 519.2740498730.

Adding to 140019931 its reverse (139910041), we get a palindrome (279929972).

It can be divided in two parts, 14001 and 9931, that added together give a palindrome (23932).

The spelling of 140019931 in words is "one hundred forty million, nineteen thousand, nine hundred thirty-one".