402946493 has 4 divisors (see below), whose sum is σ = 402989628. Its totient is φ = 402903360.

The previous prime is 402946477. The next prime is 402946501. The reversal of 402946493 is 394649204.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 300086329 + 102860164 = 17323^2 + 10142^2 .

It is a cyclic number.

It is not a de Polignac number, because 402946493 - 2⁴ = 402946477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402946493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402946993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1046 + ... + 28407.

It is an arithmetic number, because the mean of its divisors is an integer number (100747407).

Almost surely, 2^402946493 is an apocalyptic number.

It is an amenable number.

402946493 is a deficient number, since it is larger than the sum of its proper divisors (43135).

402946493 is a wasteful number, since it uses less digits than its factorization.

402946493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43134.

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 402946493 is about 20073.5271688859. The cubic root of 402946493 is about 738.6110377525.

The spelling of 402946493 in words is "four hundred two million, nine hundred forty-six thousand, four hundred ninety-three".