7621313 has 6 divisors (see below), whose sum is σ = 8865666. Its totient is φ = 6532512.

The previous prime is 7621259. The next prime is 7621399. The reversal of 7621313 is 3131267.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6927424 + 693889 = 2632^2 + 833^2 .

It is not a de Polignac number, because 7621313 - 2⁶ = 7621249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7621213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77720 + ... + 77817.

It is an arithmetic number, because the mean of its divisors is an integer number (1477611).

Almost surely, 2^7621313 is an apocalyptic number.

It is an amenable number.

7621313 is a deficient number, since it is larger than the sum of its proper divisors (1244353).

7621313 is a wasteful number, since it uses less digits than its factorization.

7621313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155551 (or 155544 counting only the distinct ones).

The product of its digits is 756, while the sum is 23.

The square root of 7621313 is about 2760.6725629817. The cubic root of 7621313 is about 196.7931297451.

The spelling of 7621313 in words is "seven million, six hundred twenty-one thousand, three hundred thirteen".