23140039 has 4 divisors (see below), whose sum is σ = 24920056. Its totient is φ = 21360024.

The previous prime is 23140037. The next prime is 23140067. The reversal of 23140039 is 93004132.

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 23140039 - 2¹ = 23140037 is a prime.

It is a super-2 number, since 2×23140039² = 1070922809843042, 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 (23140037) 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, 889989 + ... + 890014.

It is an arithmetic number, because the mean of its divisors is an integer number (6230014).

Almost surely, 2^23140039 is an apocalyptic number.

23140039 is a deficient number, since it is larger than the sum of its proper divisors (1780017).

23140039 is a wasteful number, since it uses less digits than its factorization.

23140039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780016.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 23140039 is about 4810.4094420330. The cubic root of 23140039 is about 284.9627077500.

The spelling of 23140039 in words is "twenty-three million, one hundred forty thousand, thirty-nine".