140438971 has 2 divisors, whose sum is σ = 140438972. Its totient is φ = 140438970.

The previous prime is 140438957. The next prime is 140438983. The reversal of 140438971 is 179834041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140438971 - 2⁷ = 140438843 is a prime.

It is equal to p_7935544 and since 140438971 and 7935544 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140438971.

It is not a weakly prime, because it can be changed into another prime (140438951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70219485 + 70219486.

It is an arithmetic number, because the mean of its divisors is an integer number (70219486).

Almost surely, 2^140438971 is an apocalyptic number.

140438971 is a deficient number, since it is larger than the sum of its proper divisors (1).

140438971 is an equidigital number, since it uses as much as digits as its factorization.

140438971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 140438971 is about 11850.6949585246. The cubic root of 140438971 is about 519.7915473658.

The spelling of 140438971 in words is "one hundred forty million, four hundred thirty-eight thousand, nine hundred seventy-one".