402132139 has 2 divisors, whose sum is σ = 402132140. Its totient is φ = 402132138.

The previous prime is 402132121. The next prime is 402132151. The reversal of 402132139 is 931231204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402132139 - 2⁹ = 402131627 is a prime.

It is not a weakly prime, because it can be changed into another prime (402132439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201066069 + 201066070.

It is an arithmetic number, because the mean of its divisors is an integer number (201066070).

Almost surely, 2^402132139 is an apocalyptic number.

402132139 is a deficient number, since it is larger than the sum of its proper divisors (1).

402132139 is an equidigital number, since it uses as much as digits as its factorization.

402132139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 402132139 is about 20053.2326321718. The cubic root of 402132139 is about 738.1131250660.

The spelling of 402132139 in words is "four hundred two million, one hundred thirty-two thousand, one hundred thirty-nine".