2657993 has 4 divisors (see below), whose sum is σ = 2862468. Its totient is φ = 2453520.

The previous prime is 2657951. The next prime is 2657999. The reversal of 2657993 is 3997562.

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

It can be written as a sum of positive squares in 2 ways, for example, as 840889 + 1817104 = 917^2 + 1348^2 .

It is a cyclic number.

It is not a de Polignac number, because 2657993 - 2¹² = 2653897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2657993.

It is not an unprimeable number, because it can be changed into a prime (2657999) 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, 102218 + ... + 102243.

It is an arithmetic number, because the mean of its divisors is an integer number (715617).

2^2657993 is an apocalyptic number.

It is an amenable number.

2657993 is a deficient number, since it is larger than the sum of its proper divisors (204475).

2657993 is a wasteful number, since it uses less digits than its factorization.

2657993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204474.

The product of its digits is 102060, while the sum is 41.

The square root of 2657993 is about 1630.3352415991. The cubic root of 2657993 is about 138.5217419503.

The spelling of 2657993 in words is "two million, six hundred fifty-seven thousand, nine hundred ninety-three".