813799077 has 16 divisors (see below), whose sum is σ = 1335465600. Its totient is φ = 429256512.

The previous prime is 813799067. The next prime is 813799079. The reversal of 813799077 is 770997318.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-813799077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813799079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1490202 + ... + 1490747.

It is an arithmetic number, because the mean of its divisors is an integer number (83466600).

Almost surely, 2^813799077 is an apocalyptic number.

It is an amenable number.

813799077 is a deficient number, since it is larger than the sum of its proper divisors (521666523).

813799077 is a wasteful number, since it uses less digits than its factorization.

813799077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2980972.

The product of its (nonzero) digits is 666792, while the sum is 51.

The square root of 813799077 is about 28527.1638443081. The cubic root of 813799077 is about 933.6248392031.

The spelling of 813799077 in words is "eight hundred thirteen million, seven hundred ninety-nine thousand, seventy-seven".