40751691 has 4 divisors (see below), whose sum is σ = 54335592. Its totient is φ = 27167792.

The previous prime is 40751621. The next prime is 40751693. The reversal of 40751691 is 19615704.

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 40751691 - 2⁷ = 40751563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40751693) 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, 6791946 + ... + 6791951.

It is an arithmetic number, because the mean of its divisors is an integer number (13583898).

Almost surely, 2^40751691 is an apocalyptic number.

40751691 is a deficient number, since it is larger than the sum of its proper divisors (13583901).

40751691 is a wasteful number, since it uses less digits than its factorization.

40751691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13583900.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 40751691 is about 6383.7051153699. The cubic root of 40751691 is about 344.1241974251.

The spelling of 40751691 in words is "forty million, seven hundred fifty-one thousand, six hundred ninety-one".