40989109 has 4 divisors (see below), whose sum is σ = 46844704. Its totient is φ = 35133516.

The previous prime is 40989107. The next prime is 40989119. The reversal of 40989109 is 90198904.

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 not a de Polignac number, because 40989109 - 2¹ = 40989107 is a prime.

It is a super-2 number, since 2×40989109² = 3360214113227762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40989103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2927787 + ... + 2927800.

It is an arithmetic number, because the mean of its divisors is an integer number (11711176).

Almost surely, 2^40989109 is an apocalyptic number.

It is an amenable number.

40989109 is a deficient number, since it is larger than the sum of its proper divisors (5855595).

40989109 is an equidigital number, since it uses as much as digits as its factorization.

40989109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5855594.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 40989109 is about 6402.2737367282. The cubic root of 40989109 is about 344.7911891930.

The spelling of 40989109 in words is "forty million, nine hundred eighty-nine thousand, one hundred nine".