813540037 has 8 divisors (see below), whose sum is σ = 841800960. Its totient is φ = 785405280.

The previous prime is 813540031. The next prime is 813540073. The reversal of 813540037 is 730045318.

813540037 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-813540037 is a prime.

It is a super-2 number, since 2×813540037² = 1323694783603922738, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 813539990 and 813540008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813540031) 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, 18328 + ... + 44305.

It is an arithmetic number, because the mean of its divisors is an integer number (105225120).

Almost surely, 2^813540037 is an apocalyptic number.

It is an amenable number.

813540037 is a deficient number, since it is larger than the sum of its proper divisors (28260923).

813540037 is a wasteful number, since it uses less digits than its factorization.

813540037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63083.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 813540037 is about 28522.6232489230. The cubic root of 813540037 is about 933.5257681300.

The spelling of 813540037 in words is "eight hundred thirteen million, five hundred forty thousand, thirty-seven".