402939073 has 2 divisors, whose sum is σ = 402939074. Its totient is φ = 402939072.

The previous prime is 402939071. The next prime is 402939091. The reversal of 402939073 is 370939204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 401321089 + 1617984 = 20033^2 + 1272^2 .

It is a cyclic number.

It is not a de Polignac number, because 402939073 - 2¹ = 402939071 is a prime.

Together with 402939071, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (402939071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201469536 + 201469537.

It is an arithmetic number, because the mean of its divisors is an integer number (201469537).

Almost surely, 2^402939073 is an apocalyptic number.

It is an amenable number.

402939073 is a deficient number, since it is larger than the sum of its proper divisors (1).

402939073 is an equidigital number, since it uses as much as digits as its factorization.

402939073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 402939073 is about 20073.3423475016. The cubic root of 402939073 is about 738.6065040426.

The spelling of 402939073 in words is "four hundred two million, nine hundred thirty-nine thousand, seventy-three".