140031971 has 2 divisors, whose sum is σ = 140031972. Its totient is φ = 140031970.

The previous prime is 140031967. The next prime is 140032021. The reversal of 140031971 is 179130041.

It is a weak prime.

It is an emirp because it is prime and its reverse (179130041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140031971 - 2² = 140031967 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140031971.

It is not a weakly prime, because it can be changed into another prime (140031961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70015985 + 70015986.

It is an arithmetic number, because the mean of its divisors is an integer number (70015986).

Almost surely, 2^140031971 is an apocalyptic number.

140031971 is a deficient number, since it is larger than the sum of its proper divisors (1).

140031971 is an equidigital number, since it uses as much as digits as its factorization.

140031971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 140031971 is about 11833.5105104107. The cubic root of 140031971 is about 519.2889331836.

The spelling of 140031971 in words is "one hundred forty million, thirty-one thousand, nine hundred seventy-one".