40912691 has 4 divisors (see below), whose sum is σ = 40944984. Its totient is φ = 40880400.

The previous prime is 40912687. The next prime is 40912709. The reversal of 40912691 is 19621904.

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

It is a cyclic number.

It is not a de Polignac number, because 40912691 - 2² = 40912687 is a prime.

It is a super-2 number, since 2×40912691² = 3347696569722962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40912621) 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, 14165 + ... + 16806.

It is an arithmetic number, because the mean of its divisors is an integer number (10236246).

Almost surely, 2^40912691 is an apocalyptic number.

40912691 is a deficient number, since it is larger than the sum of its proper divisors (32293).

40912691 is a wasteful number, since it uses less digits than its factorization.

40912691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32292.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 40912691 is about 6396.3029165292. The cubic root of 40912691 is about 344.5767855393.

The spelling of 40912691 in words is "forty million, nine hundred twelve thousand, six hundred ninety-one".