402622417 has 2 divisors, whose sum is σ = 402622418. Its totient is φ = 402622416.

The previous prime is 402622379. The next prime is 402622421. The reversal of 402622417 is 714226204.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 355850496 + 46771921 = 18864^2 + 6839^2 .

It is a cyclic number.

It is not a de Polignac number, because 402622417 - 2⁷ = 402622289 is a prime.

It is not a weakly prime, because it can be changed into another prime (402625417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201311208 + 201311209.

It is an arithmetic number, because the mean of its divisors is an integer number (201311209).

Almost surely, 2^402622417 is an apocalyptic number.

It is an amenable number.

402622417 is a deficient number, since it is larger than the sum of its proper divisors (1).

402622417 is an equidigital number, since it uses as much as digits as its factorization.

402622417 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 28.

The square root of 402622417 is about 20065.4533215674. The cubic root of 402622417 is about 738.4129714957.

The spelling of 402622417 in words is "four hundred two million, six hundred twenty-two thousand, four hundred seventeen".