2658631 has 4 divisors (see below), whose sum is σ = 2664792. Its totient is φ = 2652472.

The previous prime is 2658611. The next prime is 2658637. The reversal of 2658631 is 1368562.

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

It is a cyclic number.

It is not a de Polignac number, because 2658631 - 2⁷ = 2658503 is a prime.

It is a super-2 number, since 2×2658631² = 14136637588322, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2²⁰ + 6 + 5⁶ + 8² + 6² + 3¹³ + 1 .

It is a Duffinian number.

2658631 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2658593 and 2658602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2658637) 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, 2380 + ... + 3313.

It is an arithmetic number, because the mean of its divisors is an integer number (666198).

2^2658631 is an apocalyptic number.

2658631 is a deficient number, since it is larger than the sum of its proper divisors (6161).

2658631 is an equidigital number, since it uses as much as digits as its factorization.

2658631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6160.

The product of its digits is 8640, while the sum is 31.

The square root of 2658631 is about 1630.5308951381. The cubic root of 2658631 is about 138.5328242219.

The spelling of 2658631 in words is "two million, six hundred fifty-eight thousand, six hundred thirty-one".