40077889 has 2 divisors, whose sum is σ = 40077890. Its totient is φ = 40077888.

The previous prime is 40077881. The next prime is 40077907. The reversal of 40077889 is 98877004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34751025 + 5326864 = 5895^2 + 2308^2 .

It is a cyclic number.

It is not a de Polignac number, because 40077889 - 2³ = 40077881 is a prime.

It is not a weakly prime, because it can be changed into another prime (40077881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20038944 + 20038945.

It is an arithmetic number, because the mean of its divisors is an integer number (20038945).

Almost surely, 2^40077889 is an apocalyptic number.

It is an amenable number.

40077889 is a deficient number, since it is larger than the sum of its proper divisors (1).

40077889 is an equidigital number, since it uses as much as digits as its factorization.

40077889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 40077889 is about 6330.7099917782. The cubic root of 40077889 is about 342.2170259365.

The spelling of 40077889 in words is "forty million, seventy-seven thousand, eight hundred eighty-nine".