7621397 has 8 divisors (see below), whose sum is σ = 8779776. Its totient is φ = 6480432.

The previous prime is 7621259. The next prime is 7621399. The reversal of 7621397 is 7931267.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7621397 - 2¹⁰ = 7620373 is a prime.

It is a Duffinian number.

7621397 is a modest number, since divided by 1397 gives 762 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7621399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3398 + ... + 5175.

It is an arithmetic number, because the mean of its divisors is an integer number (1097472).

Almost surely, 2^7621397 is an apocalyptic number.

It is an amenable number.

7621397 is a deficient number, since it is larger than the sum of its proper divisors (1158379).

7621397 is a wasteful number, since it uses less digits than its factorization.

7621397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8707.

The product of its digits is 15876, while the sum is 35.

The square root of 7621397 is about 2760.6877766238. The cubic root of 7621397 is about 196.7938527422.

The spelling of 7621397 in words is "seven million, six hundred twenty-one thousand, three hundred ninety-seven".