40398977 has 2 divisors, whose sum is σ = 40398978. Its totient is φ = 40398976.

The previous prime is 40398961. The next prime is 40399039. The reversal of 40398977 is 77989304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36954241 + 3444736 = 6079^2 + 1856^2 .

It is a cyclic number.

It is not a de Polignac number, because 40398977 - 2⁴ = 40398961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40398937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20199488 + 20199489.

It is an arithmetic number, because the mean of its divisors is an integer number (20199489).

Almost surely, 2^40398977 is an apocalyptic number.

It is an amenable number.

40398977 is a deficient number, since it is larger than the sum of its proper divisors (1).

40398977 is an equidigital number, since it uses as much as digits as its factorization.

40398977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 40398977 is about 6356.0189584362. The cubic root of 40398977 is about 343.1284980671.

The spelling of 40398977 in words is "forty million, three hundred ninety-eight thousand, nine hundred seventy-seven".