813440373 has 8 divisors (see below), whose sum is σ = 1085635200. Its totient is φ = 541769568.

The previous prime is 813440339. The next prime is 813440413. The reversal of 813440373 is 373044318.

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

It is not a de Polignac number, because 813440373 - 2¹⁸ = 813178229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813440323) 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, 127368 + ... + 133601.

It is an arithmetic number, because the mean of its divisors is an integer number (135704400).

Almost surely, 2^813440373 is an apocalyptic number.

It is an amenable number.

813440373 is a deficient number, since it is larger than the sum of its proper divisors (272194827).

813440373 is a wasteful number, since it uses less digits than its factorization.

813440373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262011.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 813440373 is about 28520.8760910320. The cubic root of 813440373 is about 933.4876455597.

The spelling of 813440373 in words is "eight hundred thirteen million, four hundred forty thousand, three hundred seventy-three".