2123400499 has 16 divisors (see below), whose sum is σ = 2440517760. Its totient is φ = 1827144000.

The previous prime is 2123400469. The next prime is 2123400509. The reversal of 2123400499 is 9940043212.

It is not a de Polignac number, because 2123400499 - 2⁹ = 2123399987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123400469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272244 + ... + 279934.

It is an arithmetic number, because the mean of its divisors is an integer number (152532360).

Almost surely, 2^2123400499 is an apocalyptic number.

2123400499 is a deficient number, since it is larger than the sum of its proper divisors (317117261).

2123400499 is a wasteful number, since it uses less digits than its factorization.

2123400499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9042.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 2123400499 is about 46080.3699963444. The cubic root of 2123400499 is about 1285.3181443637.

The spelling of 2123400499 in words is "two billion, one hundred twenty-three million, four hundred thousand, four hundred ninety-nine".