40077797 has 4 divisors (see below), whose sum is σ = 41459820. Its totient is φ = 38695776.

The previous prime is 40077773. The next prime is 40077809. The reversal of 40077797 is 79777004.

It is a happy number.

40077797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 16273156 + 23804641 = 4034^2 + 4879^2 .

It is a cyclic number.

It is not a de Polignac number, because 40077797 - 2⁶ = 40077733 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 (40077097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 690968 + ... + 691025.

It is an arithmetic number, because the mean of its divisors is an integer number (10364955).

Almost surely, 2^40077797 is an apocalyptic number.

It is an amenable number.

40077797 is a deficient number, since it is larger than the sum of its proper divisors (1382023).

40077797 is a wasteful number, since it uses less digits than its factorization.

40077797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382022.

The product of its (nonzero) digits is 86436, while the sum is 41.

The square root of 40077797 is about 6330.7027256064. The cubic root of 40077797 is about 342.2167640798.

The spelling of 40077797 in words is "forty million, seventy-seven thousand, seven hundred ninety-seven".