40672517 has 4 divisors (see below), whose sum is σ = 43065036. Its totient is φ = 38280000.

The previous prime is 40672507. The next prime is 40672523. The reversal of 40672517 is 71527604.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37283236 + 3389281 = 6106^2 + 1841^2 .

It is a cyclic number.

It is not a de Polignac number, because 40672517 - 2⁴ = 40672501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40672507) 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, 1196234 + ... + 1196267.

It is an arithmetic number, because the mean of its divisors is an integer number (10766259).

Almost surely, 2^40672517 is an apocalyptic number.

It is an amenable number.

40672517 is a deficient number, since it is larger than the sum of its proper divisors (2392519).

40672517 is a wasteful number, since it uses less digits than its factorization.

40672517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2392518.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 40672517 is about 6377.5008428067. The cubic root of 40672517 is about 343.9011935670.

The spelling of 40672517 in words is "forty million, six hundred seventy-two thousand, five hundred seventeen".