40040977 has 2 divisors, whose sum is σ = 40040978. Its totient is φ = 40040976.

The previous prime is 40040963. The next prime is 40040981. The reversal of 40040977 is 77904004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22810176 + 17230801 = 4776^2 + 4151^2 .

It is a cyclic number.

It is not a de Polignac number, because 40040977 - 2⁷ = 40040849 is a prime.

It is a super-2 number, since 2×40040977² = 3206559678229058, which contains 22 as substring.

It is equal to p_2435980 and since 40040977 and 2435980 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40040177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20020488 + 20020489.

It is an arithmetic number, because the mean of its divisors is an integer number (20020489).

Almost surely, 2^40040977 is an apocalyptic number.

It is an amenable number.

40040977 is a deficient number, since it is larger than the sum of its proper divisors (1).

40040977 is an equidigital number, since it uses as much as digits as its factorization.

40040977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 40040977 is about 6327.7940073931. The cubic root of 40040977 is about 342.1119322869. Note that the first 3 decimals are identical.

The spelling of 40040977 in words is "forty million, forty thousand, nine hundred seventy-seven".