23121479 has 4 divisors (see below), whose sum is σ = 24481584. Its totient is φ = 21761376.

The previous prime is 23121473. The next prime is 23121481. The reversal of 23121479 is 97412132.

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 23121479 - 2¹⁶ = 23055943 is a prime.

It is a super-2 number, since 2×23121479² = 1069205582294882, 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 (23121473) 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, 680027 + ... + 680060.

It is an arithmetic number, because the mean of its divisors is an integer number (6120396).

Almost surely, 2^23121479 is an apocalyptic number.

23121479 is a deficient number, since it is larger than the sum of its proper divisors (1360105).

23121479 is a wasteful number, since it uses less digits than its factorization.

23121479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360104.

The product of its digits is 3024, while the sum is 29.

The square root of 23121479 is about 4808.4799053339. The cubic root of 23121479 is about 284.8865004092.

The spelling of 23121479 in words is "twenty-three million, one hundred twenty-one thousand, four hundred seventy-nine".