402101239 has 2 divisors, whose sum is σ = 402101240. Its totient is φ = 402101238.

The previous prime is 402101197. The next prime is 402101243. The reversal of 402101239 is 932101204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402101239 - 2¹³ = 402093047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402101339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201050619 + 201050620.

It is an arithmetic number, because the mean of its divisors is an integer number (201050620).

Almost surely, 2^402101239 is an apocalyptic number.

402101239 is a deficient number, since it is larger than the sum of its proper divisors (1).

402101239 is an equidigital number, since it uses as much as digits as its factorization.

402101239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 402101239 is about 20052.4621680232. The cubic root of 402101239 is about 738.0942189424.

The spelling of 402101239 in words is "four hundred two million, one hundred one thousand, two hundred thirty-nine".