40122989 has 4 divisors (see below), whose sum is σ = 40155360. Its totient is φ = 40090620.

The previous prime is 40122923. The next prime is 40123001. The reversal of 40122989 is 98922104.

40122989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40122989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40122289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14249 + ... + 16830.

It is an arithmetic number, because the mean of its divisors is an integer number (10038840).

Almost surely, 2^40122989 is an apocalyptic number.

It is an amenable number.

40122989 is a deficient number, since it is larger than the sum of its proper divisors (32371).

40122989 is a wasteful number, since it uses less digits than its factorization.

40122989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32370.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 40122989 is about 6334.2709919927. The cubic root of 40122989 is about 342.3453444228.

The spelling of 40122989 in words is "forty million, one hundred twenty-two thousand, nine hundred eighty-nine".