118923551 has 4 divisors (see below), whose sum is σ = 125919072. Its totient is φ = 111928032.

The previous prime is 118923529. The next prime is 118923557. The reversal of 118923551 is 155329811.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 118923551 - 2¹⁰ = 118922527 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 (118923557) 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, 3497735 + ... + 3497768.

It is an arithmetic number, because the mean of its divisors is an integer number (31479768).

Almost surely, 2^118923551 is an apocalyptic number.

118923551 is a deficient number, since it is larger than the sum of its proper divisors (6995521).

118923551 is an equidigital number, since it uses as much as digits as its factorization.

118923551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6995520.

The product of its digits is 10800, while the sum is 35.

The square root of 118923551 is about 10905.2075175120. The cubic root of 118923551 is about 491.7631207619.

The spelling of 118923551 in words is "one hundred eighteen million, nine hundred twenty-three thousand, five hundred fifty-one".