2143357493 has 8 divisors (see below), whose sum is σ = 2166832920. Its totient is φ = 2119910400.

The previous prime is 2143357477. The next prime is 2143357499. The reversal of 2143357493 is 3947533412.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 378769444 + 1764588049 = 19462^2 + 42007^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2143357493 - 2⁴ = 2143357477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2143357493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143357499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168563 + ... + 180831.

It is an arithmetic number, because the mean of its divisors is an integer number (270854115).

Almost surely, 2^2143357493 is an apocalyptic number.

It is an amenable number.

2143357493 is a deficient number, since it is larger than the sum of its proper divisors (23475427).

2143357493 is a wasteful number, since it uses less digits than its factorization.

2143357493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14167.

The product of its digits is 272160, while the sum is 41.

The square root of 2143357493 is about 46296.4090724108. The cubic root of 2143357493 is about 1289.3323253997.

The spelling of 2143357493 in words is "two billion, one hundred forty-three million, three hundred fifty-seven thousand, four hundred ninety-three".