108969557 has 4 divisors (see below), whose sum is σ = 112484736. Its totient is φ = 105454380.

The previous prime is 108969533. The next prime is 108969569. The reversal of 108969557 is 755969801.

It is a happy number.

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 108969557 - 2¹⁸ = 108707413 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108969517) 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, 1757543 + ... + 1757604.

It is an arithmetic number, because the mean of its divisors is an integer number (28121184).

Almost surely, 2^108969557 is an apocalyptic number.

It is an amenable number.

108969557 is a deficient number, since it is larger than the sum of its proper divisors (3515179).

108969557 is an equidigital number, since it uses as much as digits as its factorization.

108969557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3515178.

The product of its (nonzero) digits is 680400, while the sum is 50.

The square root of 108969557 is about 10438.8484518169. The cubic root of 108969557 is about 477.6411424542.

It can be divided in two parts, 108 and 969557, that multiplied together give a triangular number (104712156 = T₁₄₄₇₁).

The spelling of 108969557 in words is "one hundred eight million, nine hundred sixty-nine thousand, five hundred fifty-seven".