245971613 has 4 divisors (see below), whose sum is σ = 246009888. Its totient is φ = 245933340.

The previous prime is 245971553. The next prime is 245971631. The reversal of 245971613 is 316179542.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 245971613 - 2¹⁰ = 245970589 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 (245971643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6881 + ... + 23222.

It is an arithmetic number, because the mean of its divisors is an integer number (61502472).

Almost surely, 2^245971613 is an apocalyptic number.

It is an amenable number.

245971613 is a deficient number, since it is larger than the sum of its proper divisors (38275).

245971613 is an equidigital number, since it uses as much as digits as its factorization.

245971613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38274.

The product of its digits is 45360, while the sum is 38.

The square root of 245971613 is about 15683.4821707426. The cubic root of 245971613 is about 626.5585533212.

The spelling of 245971613 in words is "two hundred forty-five million, nine hundred seventy-one thousand, six hundred thirteen".