2113973 has 2 divisors, whose sum is σ = 2113974. Its totient is φ = 2113972.

The previous prime is 2113957. The next prime is 2113987. The reversal of 2113973 is 3793112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2093809 + 20164 = 1447^2 + 142^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113973 - 2⁴ = 2113957 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2113913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056986 + 1056987.

It is an arithmetic number, because the mean of its divisors is an integer number (1056987).

2^2113973 is an apocalyptic number.

It is an amenable number.

2113973 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113973 is an equidigital number, since it uses as much as digits as its factorization.

2113973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1134, while the sum is 26.

The square root of 2113973 is about 1453.9508244779. The cubic root of 2113973 is about 128.3413131973.

It can be divided in two parts, 21139 and 73, that added together give a palindrome (21212).

The spelling of 2113973 in words is "two million, one hundred thirteen thousand, nine hundred seventy-three".