402344387 has 2 divisors, whose sum is σ = 402344388. Its totient is φ = 402344386.

The previous prime is 402344363. The next prime is 402344407. The reversal of 402344387 is 783443204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402344387 - 2¹⁰ = 402343363 is a prime.

It is not a weakly prime, because it can be changed into another prime (402344687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201172193 + 201172194.

It is an arithmetic number, because the mean of its divisors is an integer number (201172194).

Almost surely, 2^402344387 is an apocalyptic number.

402344387 is a deficient number, since it is larger than the sum of its proper divisors (1).

402344387 is an equidigital number, since it uses as much as digits as its factorization.

402344387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 35.

The square root of 402344387 is about 20058.5240483940. The cubic root of 402344387 is about 738.2429625538.

The spelling of 402344387 in words is "four hundred two million, three hundred forty-four thousand, three hundred eighty-seven".