402135493 has 8 divisors (see below), whose sum is σ = 428172480. Its totient is φ = 376363200.

The previous prime is 402135469. The next prime is 402135497. The reversal of 402135493 is 394531204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402135493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402135497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63033 + ... + 69118.

It is an arithmetic number, because the mean of its divisors is an integer number (53521560).

Almost surely, 2^402135493 is an apocalyptic number.

It is an amenable number.

402135493 is a deficient number, since it is larger than the sum of its proper divisors (26036987).

402135493 is a wasteful number, since it uses less digits than its factorization.

402135493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132347.

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

The square root of 402135493 is about 20053.3162594121. The cubic root of 402135493 is about 738.1151771482.

Adding to 402135493 its reverse (394531204), we get a palindrome (796666697).

The spelling of 402135493 in words is "four hundred two million, one hundred thirty-five thousand, four hundred ninety-three".