142990787 has 2 divisors, whose sum is σ = 142990788. Its totient is φ = 142990786.

The previous prime is 142990763. The next prime is 142990877. The reversal of 142990787 is 787099241.

142990787 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (142990877) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142990787 - 2¹⁸ = 142728643 is a prime.

It is not a weakly prime, because it can be changed into another prime (142990717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71495393 + 71495394.

It is an arithmetic number, because the mean of its divisors is an integer number (71495394).

Almost surely, 2^142990787 is an apocalyptic number.

142990787 is a deficient number, since it is larger than the sum of its proper divisors (1).

142990787 is an equidigital number, since it uses as much as digits as its factorization.

142990787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 142990787 is about 11957.8755220148. The cubic root of 142990787 is about 522.9209226922.

The spelling of 142990787 in words is "one hundred forty-two million, nine hundred ninety thousand, seven hundred eighty-seven".