11958623 has 4 divisors (see below), whose sum is σ = 12154728. Its totient is φ = 11762520.

The previous prime is 11958613. The next prime is 11958631. The reversal of 11958623 is 32685911.

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 11958623 - 2⁴ = 11958607 is a prime.

It is a super-2 number, since 2×11958623² = 286017328112258, 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 (11958613) 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, 97961 + ... + 98082.

It is an arithmetic number, because the mean of its divisors is an integer number (3038682).

Almost surely, 2^11958623 is an apocalyptic number.

11958623 is a deficient number, since it is larger than the sum of its proper divisors (196105).

11958623 is an equidigital number, since it uses as much as digits as its factorization.

11958623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196104.

The product of its digits is 12960, while the sum is 35.

The square root of 11958623 is about 3458.1242025121. The cubic root of 11958623 is about 228.6794074826.

The spelling of 11958623 in words is "eleven million, nine hundred fifty-eight thousand, six hundred twenty-three".