40721677 has 4 divisors (see below), whose sum is σ = 40866876. Its totient is φ = 40576480.

The previous prime is 40721641. The next prime is 40721689. The reversal of 40721677 is 77612704.

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 31685641 + 9036036 = 5629^2 + 3006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40721677 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 (40721627) 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, 72178 + ... + 72739.

It is an arithmetic number, because the mean of its divisors is an integer number (10216719).

Almost surely, 2^40721677 is an apocalyptic number.

It is an amenable number.

40721677 is a deficient number, since it is larger than the sum of its proper divisors (145199).

40721677 is a wasteful number, since it uses less digits than its factorization.

40721677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145198.

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 40721677 is about 6381.3538532196. The cubic root of 40721677 is about 344.0396931167.

The spelling of 40721677 in words is "forty million, seven hundred twenty-one thousand, six hundred seventy-seven".