2138023 has 4 divisors (see below), whose sum is σ = 2168208. Its totient is φ = 2107840.

The previous prime is 2137999. The next prime is 2138029. The reversal of 2138023 is 3208312.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2138023 is a prime.

It is a super-2 number, since 2×2138023² = 9142284697058, 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 (2138029) 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, 14986 + ... + 15127.

It is an arithmetic number, because the mean of its divisors is an integer number (542052).

2^2138023 is an apocalyptic number.

2138023 is a deficient number, since it is larger than the sum of its proper divisors (30185).

2138023 is an equidigital number, since it uses as much as digits as its factorization.

2138023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30184.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2138023 is about 1462.1980030078. The cubic root of 2138023 is about 128.8261785645.

The spelling of 2138023 in words is "two million, one hundred thirty-eight thousand, twenty-three".