6629391 has 8 divisors (see below), whose sum is σ = 9821360. Its totient is φ = 4419576.

The previous prime is 6629387. The next prime is 6629393. The reversal of 6629391 is 1939266.

It is not a de Polignac number, because 6629391 - 2² = 6629387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6629393) 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, 122740 + ... + 122793.

It is an arithmetic number, because the mean of its divisors is an integer number (1227670).

Almost surely, 2^6629391 is an apocalyptic number.

6629391 is a deficient number, since it is larger than the sum of its proper divisors (3191969).

6629391 is a wasteful number, since it uses less digits than its factorization.

6629391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245542 (or 245536 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 6629391 is about 2574.7603772002. The cubic root of 6629391 is about 187.8557725113.

The spelling of 6629391 in words is "six million, six hundred twenty-nine thousand, three hundred ninety-one".