40783669 has 4 divisors (see below), whose sum is σ = 42556896. Its totient is φ = 39010444.

The previous prime is 40783661. The next prime is 40783679. The reversal of 40783669 is 96638704.

It is a happy number.

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 40783669 - 2³ = 40783661 is a prime.

It is a super-2 number, since 2×40783669² = 3326615314203122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40783661) 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, 886579 + ... + 886624.

It is an arithmetic number, because the mean of its divisors is an integer number (10639224).

Almost surely, 2^40783669 is an apocalyptic number.

It is an amenable number.

40783669 is a deficient number, since it is larger than the sum of its proper divisors (1773227).

40783669 is a wasteful number, since it uses less digits than its factorization.

40783669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1773226.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 40783669 is about 6386.2092825087. The cubic root of 40783669 is about 344.2141857272.

The spelling of 40783669 in words is "forty million, seven hundred eighty-three thousand, six hundred sixty-nine".