813771038 has 4 divisors (see below), whose sum is σ = 1220656560. Its totient is φ = 406885518.

The previous prime is 813771029. The next prime is 813771041. The reversal of 813771038 is 830177318.

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

It is a junction number, because it is equal to n+sod(n) for n = 813770992 and 813771010.

It is a congruent number.

It is an unprimeable number.

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, 203442758 + ... + 203442761.

It is an arithmetic number, because the mean of its divisors is an integer number (305164140).

Almost surely, 2^813771038 is an apocalyptic number.

813771038 is a deficient number, since it is larger than the sum of its proper divisors (406885522).

813771038 is a wasteful number, since it uses less digits than its factorization.

813771038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406885521.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 813771038 is about 28526.6723961979. The cubic root of 813771038 is about 933.6141165697.

The spelling of 813771038 in words is "eight hundred thirteen million, seven hundred seventy-one thousand, thirty-eight".