40576981 has 2 divisors, whose sum is σ = 40576982. Its totient is φ = 40576980.

The previous prime is 40576961. The next prime is 40576999. The reversal of 40576981 is 18967504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40576900 + 81 = 6370^2 + 9^2 .

It is a cyclic number.

It is not a de Polignac number, because 40576981 - 2⁹ = 40576469 is a prime.

It is a super-2 number, since 2×40576981² = 3292982774148722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40576961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20288490 + 20288491.

It is an arithmetic number, because the mean of its divisors is an integer number (20288491).

Almost surely, 2^40576981 is an apocalyptic number.

It is an amenable number.

40576981 is a deficient number, since it is larger than the sum of its proper divisors (1).

40576981 is an equidigital number, since it uses as much as digits as its factorization.

40576981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 40576981 is about 6370.0063579246. The cubic root of 40576981 is about 343.6317183793.

It can be divided in two parts, 405769 and 81, that multiplied together give a square (32867289 = 5733²).

The spelling of 40576981 in words is "forty million, five hundred seventy-six thousand, nine hundred eighty-one".