402122387 has 2 divisors, whose sum is σ = 402122388. Its totient is φ = 402122386.

The previous prime is 402122377. The next prime is 402122419. The reversal of 402122387 is 783221204.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402122387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (402122377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201061193 + 201061194.

It is an arithmetic number, because the mean of its divisors is an integer number (201061194).

Almost surely, 2^402122387 is an apocalyptic number.

402122387 is a deficient number, since it is larger than the sum of its proper divisors (1).

402122387 is an equidigital number, since it uses as much as digits as its factorization.

402122387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 402122387 is about 20052.9894778808. The cubic root of 402122387 is about 738.1071584225.

The spelling of 402122387 in words is "four hundred two million, one hundred twenty-two thousand, three hundred eighty-seven".