2681629 has 4 divisors (see below), whose sum is σ = 2685184. Its totient is φ = 2678076.

The previous prime is 2681617. The next prime is 2681663. The reversal of 2681629 is 9261862.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9261862 = 2 ⋅4630931.

It is a cyclic number.

It is not a de Polignac number, because 2681629 - 2⁹ = 2681117 is a prime.

It is a super-2 number, since 2×2681629² = 14382268187282, which contains 22 as substring.

It is a Duffinian number.

2681629 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2681594 and 2681603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2681729) 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, 147 + ... + 2320.

It is an arithmetic number, because the mean of its divisors is an integer number (671296).

2^2681629 is an apocalyptic number.

It is an amenable number.

2681629 is a deficient number, since it is larger than the sum of its proper divisors (3555).

2681629 is a wasteful number, since it uses less digits than its factorization.

2681629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3554.

The product of its digits is 10368, while the sum is 34.

The square root of 2681629 is about 1637.5680138547. The cubic root of 2681629 is about 138.9311288649.

The spelling of 2681629 in words is "two million, six hundred eighty-one thousand, six hundred twenty-nine".