2630691 has 32 divisors (see below), whose sum is σ = 4608000. Its totient is φ = 1451520.

The previous prime is 2630689. The next prime is 2630707. The reversal of 2630691 is 1960362.

It is a happy number.

It is not a de Polignac number, because 2630691 - 2¹ = 2630689 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

2630691 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2630681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5635 + ... + 6083.

It is an arithmetic number, because the mean of its divisors is an integer number (144000).

2^2630691 is an apocalyptic number.

2630691 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2630691 is a deficient number, since it is larger than the sum of its proper divisors (1977309).

2630691 is a wasteful number, since it uses less digits than its factorization.

2630691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496 (or 490 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 2630691 is about 1621.9405044575. The cubic root of 2630691 is about 138.0458259906.

It can be divided in two parts, 2630 and 691, that added together give a triangular number (3321 = T₈₁).

The spelling of 2630691 in words is "two million, six hundred thirty thousand, six hundred ninety-one".