61853197 has 4 divisors (see below), whose sum is σ = 70689376. Its totient is φ = 53017020.

The previous prime is 61853161. The next prime is 61853203. The reversal of 61853197 is 79135816.

61853197 is nontrivially palindromic in base 3.

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 not a de Polignac number, because 61853197 - 2¹⁹ = 61328909 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 (61853137) 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, 4418079 + ... + 4418092.

It is an arithmetic number, because the mean of its divisors is an integer number (17672344).

Almost surely, 2^61853197 is an apocalyptic number.

It is an amenable number.

61853197 is a deficient number, since it is larger than the sum of its proper divisors (8836179).

61853197 is an equidigital number, since it uses as much as digits as its factorization.

61853197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8836178.

The product of its digits is 45360, while the sum is 40.

The square root of 61853197 is about 7864.6803495120. The cubic root of 61853197 is about 395.4765321765.

The spelling of 61853197 in words is "sixty-one million, eight hundred fifty-three thousand, one hundred ninety-seven".