40689277 has 4 divisors (see below), whose sum is σ = 42458400. Its totient is φ = 38920156.

The previous prime is 40689247. The next prime is 40689281. The reversal of 40689277 is 77298604.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40689277 - 2¹⁹ = 40164989 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 (40689217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 884527 + ... + 884572.

It is an arithmetic number, because the mean of its divisors is an integer number (10614600).

Almost surely, 2^40689277 is an apocalyptic number.

It is an amenable number.

40689277 is a deficient number, since it is larger than the sum of its proper divisors (1769123).

40689277 is a wasteful number, since it uses less digits than its factorization.

40689277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1769122.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 40689277 is about 6378.8147018079. The cubic root of 40689277 is about 343.9484244157.

The spelling of 40689277 in words is "forty million, six hundred eighty-nine thousand, two hundred seventy-seven".