3613661397 has 24 divisors (see below), whose sum is σ = 5386944000. Its totient is φ = 2394182808.

The previous prime is 3613661339. The next prime is 3613661407. The reversal of 3613661397 is 7931663163.

3613661397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3613661397 - 2⁶ = 3613661333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3613662397) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 750604 + ... + 755402.

It is an arithmetic number, because the mean of its divisors is an integer number (224456000).

Almost surely, 2^3613661397 is an apocalyptic number.

It is an amenable number.

3613661397 is a deficient number, since it is larger than the sum of its proper divisors (1773282603).

3613661397 is an equidigital number, since it uses as much as digits as its factorization.

3613661397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5142 (or 4969 counting only the distinct ones).

The product of its digits is 367416, while the sum is 45.

The square root of 3613661397 is about 60113.7371737941. The cubic root of 3613661397 is about 1534.5550949183. Note that the first 3 decimals are identical.

The spelling of 3613661397 in words is "three billion, six hundred thirteen million, six hundred sixty-one thousand, three hundred ninety-seven".