813740402 has 4 divisors (see below), whose sum is σ = 1220610606. Its totient is φ = 406870200.

The previous prime is 813740401. The next prime is 813740419. The reversal of 813740402 is 204047318.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 559369801 + 254370601 = 23651^2 + 15949^2 .

It is not an unprimeable number, because it can be changed into a prime (813740401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203435099 + ... + 203435102.

Almost surely, 2^813740402 is an apocalyptic number.

813740402 is a deficient number, since it is larger than the sum of its proper divisors (406870204).

813740402 is a wasteful number, since it uses less digits than its factorization.

813740402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406870203.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 813740402 is about 28526.1354199969. The cubic root of 813740402 is about 933.6024005137.

The spelling of 813740402 in words is "eight hundred thirteen million, seven hundred forty thousand, four hundred two".