37145813 has 4 divisors (see below), whose sum is σ = 37258368. Its totient is φ = 37033260.

The previous prime is 37145809. The next prime is 37145819. The reversal of 37145813 is 31854173.

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 37145813 - 2² = 37145809 is a prime.

It is a super-2 number, since 2×37145813² = 2759622846861938, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 37145813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37145819) 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, 55781 + ... + 56442.

It is an arithmetic number, because the mean of its divisors is an integer number (9314592).

Almost surely, 2^37145813 is an apocalyptic number.

It is an amenable number.

37145813 is a deficient number, since it is larger than the sum of its proper divisors (112555).

37145813 is a wasteful number, since it uses less digits than its factorization.

37145813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112554.

The product of its digits is 10080, while the sum is 32.

The square root of 37145813 is about 6094.7364996364. The cubic root of 37145813 is about 333.6593422728.

Adding to 37145813 its reverse (31854173), we get a palindrome (68999986).

The spelling of 37145813 in words is "thirty-seven million, one hundred forty-five thousand, eight hundred thirteen".