813381401 has 4 divisors (see below), whose sum is σ = 929578752. Its totient is φ = 697184052.

The previous prime is 813381383. The next prime is 813381409. The reversal of 813381401 is 104183318.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 813381401 - 2¹⁰ = 813380377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (813381409) 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, 58098665 + ... + 58098678.

It is an arithmetic number, because the mean of its divisors is an integer number (232394688).

Almost surely, 2^813381401 is an apocalyptic number.

It is an amenable number.

813381401 is a deficient number, since it is larger than the sum of its proper divisors (116197351).

813381401 is a wasteful number, since it uses less digits than its factorization.

813381401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116197350.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 813381401 is about 28519.8422330840. The cubic root of 813381401 is about 933.4650866582.

The spelling of 813381401 in words is "eight hundred thirteen million, three hundred eighty-one thousand, four hundred one".