40879481 has 2 divisors, whose sum is σ = 40879482. Its totient is φ = 40879480.

The previous prime is 40879471. The next prime is 40879499. The reversal of 40879481 is 18497804.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36192256 + 4687225 = 6016^2 + 2165^2 .

It is a cyclic number.

It is not a de Polignac number, because 40879481 - 2¹⁰ = 40878457 is a prime.

It is a super-2 number, since 2×40879481² = 3342263933658722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40879411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20439740 + 20439741.

It is an arithmetic number, because the mean of its divisors is an integer number (20439741).

Almost surely, 2^40879481 is an apocalyptic number.

It is an amenable number.

40879481 is a deficient number, since it is larger than the sum of its proper divisors (1).

40879481 is an equidigital number, since it uses as much as digits as its factorization.

40879481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 40879481 is about 6393.7063585998. The cubic root of 40879481 is about 344.4835260276.

The spelling of 40879481 in words is "forty million, eight hundred seventy-nine thousand, four hundred eighty-one".