40908089 has 2 divisors, whose sum is σ = 40908090. Its totient is φ = 40908088.

The previous prime is 40908061. The next prime is 40908107. The reversal of 40908089 is 98080904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35581225 + 5326864 = 5965^2 + 2308^2 .

It is a cyclic number.

It is not a de Polignac number, because 40908089 - 2²⁰ = 39859513 is a prime.

It is not a weakly prime, because it can be changed into another prime (40908059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20454044 + 20454045.

It is an arithmetic number, because the mean of its divisors is an integer number (20454045).

Almost surely, 2^40908089 is an apocalyptic number.

It is an amenable number.

40908089 is a deficient number, since it is larger than the sum of its proper divisors (1).

40908089 is an equidigital number, since it uses as much as digits as its factorization.

40908089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 40908089 is about 6395.9431673523. The cubic root of 40908089 is about 344.5638653281.

The spelling of 40908089 in words is "forty million, nine hundred eight thousand, eighty-nine".