402739 has 2 divisors, whose sum is σ = 402740. Its totient is φ = 402738.

The previous prime is 402697. The next prime is 402751. The reversal of 402739 is 937204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402739 is a prime.

It is not a weakly prime, because it can be changed into another prime (402769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201369 + 201370.

It is an arithmetic number, because the mean of its divisors is an integer number (201370).

2⁴⁰²⁷³⁹ is an apocalyptic number.

402739 is a deficient number, since it is larger than the sum of its proper divisors (1).

402739 is an equidigital number, since it uses as much as digits as its factorization.

402739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 402739 is about 634.6172074566. The cubic root of 402739 is about 73.8484236026.

The spelling of 402739 in words is "four hundred two thousand, seven hundred thirty-nine".