40620513 has 4 divisors (see below), whose sum is σ = 54160688. Its totient is φ = 27080340.

The previous prime is 40620511. The next prime is 40620523. The reversal of 40620513 is 31502604.

It is a happy number.

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 not a de Polignac number, because 40620513 - 2¹ = 40620511 is a prime.

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 40620513.

It is not an unprimeable number, because it can be changed into a prime (40620511) 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, 6770083 + ... + 6770088.

It is an arithmetic number, because the mean of its divisors is an integer number (13540172).

Almost surely, 2^40620513 is an apocalyptic number.

It is an amenable number.

40620513 is a deficient number, since it is larger than the sum of its proper divisors (13540175).

40620513 is a wasteful number, since it uses less digits than its factorization.

40620513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13540174.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 40620513 is about 6373.4223930319. The cubic root of 40620513 is about 343.7545600277.

The spelling of 40620513 in words is "forty million, six hundred twenty thousand, five hundred thirteen".