402242023987 has 2 divisors, whose sum is σ = 402242023988. Its totient is φ = 402242023986.

The previous prime is 402242023907. The next prime is 402242024047. The reversal of 402242023987 is 789320242204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402242023987 - 2¹⁵ = 402241991219 is a prime.

It is a super-2 number, since 2×402242023987² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (402242023907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201121011993 + 201121011994.

It is an arithmetic number, because the mean of its divisors is an integer number (201121011994).

Almost surely, 2^402242023987 is an apocalyptic number.

402242023987 is a deficient number, since it is larger than the sum of its proper divisors (1).

402242023987 is an equidigital number, since it uses as much as digits as its factorization.

402242023987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 43.

The spelling of 402242023987 in words is "four hundred two billion, two hundred forty-two million, twenty-three thousand, nine hundred eighty-seven".