40634679 has 4 divisors (see below), whose sum is σ = 54179576. Its totient is φ = 27089784.

The previous prime is 40634651. The next prime is 40634689. The reversal of 40634679 is 97643604.

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

It is not a de Polignac number, because 40634679 - 2¹⁹ = 40110391 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 (40634689) 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, 6772444 + ... + 6772449.

It is an arithmetic number, because the mean of its divisors is an integer number (13544894).

Almost surely, 2^40634679 is an apocalyptic number.

40634679 is a deficient number, since it is larger than the sum of its proper divisors (13544897).

40634679 is a wasteful number, since it uses less digits than its factorization.

40634679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13544896.

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 40634679 is about 6374.5336299999. The cubic root of 40634679 is about 343.7945157115.

The spelling of 40634679 in words is "forty million, six hundred thirty-four thousand, six hundred seventy-nine".