813580397 has 8 divisors (see below), whose sum is σ = 943684416. Its totient is φ = 686945952.

The previous prime is 813580307. The next prime is 813580423. The reversal of 813580397 is 793085318.

It is a happy number.

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

It is not a de Polignac number, because 813580397 - 2¹⁴ = 813564013 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 (813580307) 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, 866888 + ... + 867825.

It is an arithmetic number, because the mean of its divisors is an integer number (117960552).

Almost surely, 2^813580397 is an apocalyptic number.

It is an amenable number.

813580397 is a deficient number, since it is larger than the sum of its proper divisors (130104019).

813580397 is a wasteful number, since it uses less digits than its factorization.

813580397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734787.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 813580397 is about 28523.3307487046. The cubic root of 813580397 is about 933.5412053858.

The spelling of 813580397 in words is "eight hundred thirteen million, five hundred eighty thousand, three hundred ninety-seven".