402101971 has 2 divisors, whose sum is σ = 402101972. Its totient is φ = 402101970.

The previous prime is 402101951. The next prime is 402101983. The reversal of 402101971 is 179101204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402101971 - 2²³ = 393713363 is a prime.

It is not a weakly prime, because it can be changed into another prime (402101951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201050985 + 201050986.

It is an arithmetic number, because the mean of its divisors is an integer number (201050986).

Almost surely, 2^402101971 is an apocalyptic number.

402101971 is a deficient number, since it is larger than the sum of its proper divisors (1).

402101971 is an equidigital number, since it uses as much as digits as its factorization.

402101971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 402101971 is about 20052.4804201376. The cubic root of 402101971 is about 738.0946668268.

The spelling of 402101971 in words is "four hundred two million, one hundred one thousand, nine hundred seventy-one".