142008931 has 2 divisors, whose sum is σ = 142008932. Its totient is φ = 142008930.

The previous prime is 142008917. The next prime is 142008947. The reversal of 142008931 is 139800241.

It is a happy number.

142008931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142008931 is a prime.

It is a super-2 number, since 2×142008931² = 40333072967525522, 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 142008931.

It is not a weakly prime, because it can be changed into another prime (142008901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71004465 + 71004466.

It is an arithmetic number, because the mean of its divisors is an integer number (71004466).

Almost surely, 2^142008931 is an apocalyptic number.

142008931 is a deficient number, since it is larger than the sum of its proper divisors (1).

142008931 is an equidigital number, since it uses as much as digits as its factorization.

142008931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 142008931 is about 11916.7500183565. The cubic root of 142008931 is about 521.7212819455.

The spelling of 142008931 in words is "one hundred forty-two million, eight thousand, nine hundred thirty-one".