40180913 has 4 divisors (see below), whose sum is σ = 40286208. Its totient is φ = 40075620.

The previous prime is 40180871. The next prime is 40180937. The reversal of 40180913 is 31908104.

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 40180913 - 2⁶ = 40180849 is a prime.

It is a super-2 number, since 2×40180913² = 3229011539027138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40180993) 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, 52073 + ... + 52838.

It is an arithmetic number, because the mean of its divisors is an integer number (10071552).

Almost surely, 2^40180913 is an apocalyptic number.

It is an amenable number.

40180913 is a deficient number, since it is larger than the sum of its proper divisors (105295).

40180913 is a wasteful number, since it uses less digits than its factorization.

40180913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105294.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 40180913 is about 6338.8416134180. The cubic root of 40180913 is about 342.5100087650.

The spelling of 40180913 in words is "forty million, one hundred eighty thousand, nine hundred thirteen".