402153439 has 2 divisors, whose sum is σ = 402153440. Its totient is φ = 402153438.

The previous prime is 402153403. The next prime is 402153463. The reversal of 402153439 is 934351204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402153439 - 2¹¹ = 402151391 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 402153439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402153539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201076719 + 201076720.

It is an arithmetic number, because the mean of its divisors is an integer number (201076720).

Almost surely, 2^402153439 is an apocalyptic number.

402153439 is a deficient number, since it is larger than the sum of its proper divisors (1).

402153439 is an equidigital number, since it uses as much as digits as its factorization.

402153439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 402153439 is about 20053.7637115829. The cubic root of 402153439 is about 738.1261568786.

The spelling of 402153439 in words is "four hundred two million, one hundred fifty-three thousand, four hundred thirty-nine".