40757881 has 2 divisors, whose sum is σ = 40757882. Its totient is φ = 40757880.

The previous prime is 40757879. The next prime is 40757903. The reversal of 40757881 is 18875704.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30415225 + 10342656 = 5515^2 + 3216^2 .

It is a cyclic number.

It is not a de Polignac number, because 40757881 - 2¹ = 40757879 is a prime.

It is a super-2 number, since 2×40757881² = 3322409727220322, which contains 22 as substring.

Together with 40757879, it forms a pair of twin primes.

It is equal to p_2476975 and since 40757881 and 2476975 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 (40757861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20378940 + 20378941.

It is an arithmetic number, because the mean of its divisors is an integer number (20378941).

Almost surely, 2^40757881 is an apocalyptic number.

It is an amenable number.

40757881 is a deficient number, since it is larger than the sum of its proper divisors (1).

40757881 is an equidigital number, since it uses as much as digits as its factorization.

40757881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 40757881 is about 6384.1899251197. The cubic root of 40757881 is about 344.1416201863.

The spelling of 40757881 in words is "forty million, seven hundred fifty-seven thousand, eight hundred eighty-one".