402423851 has 2 divisors, whose sum is σ = 402423852. Its totient is φ = 402423850.

The previous prime is 402423839. The next prime is 402423863. The reversal of 402423851 is 158324204.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (402423839) and next prime (402423863).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402423851 is a prime.

It is not a weakly prime, because it can be changed into another prime (402423251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201211925 + 201211926.

It is an arithmetic number, because the mean of its divisors is an integer number (201211926).

Almost surely, 2^402423851 is an apocalyptic number.

402423851 is a deficient number, since it is larger than the sum of its proper divisors (1).

402423851 is an equidigital number, since it uses as much as digits as its factorization.

402423851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 402423851 is about 20060.5047543675. The cubic root of 402423851 is about 738.2915609511.

The spelling of 402423851 in words is "four hundred two million, four hundred twenty-three thousand, eight hundred fifty-one".