61172897 has 4 divisors (see below), whose sum is σ = 62474496. Its totient is φ = 59871300.

The previous prime is 61172887. The next prime is 61172899. The reversal of 61172897 is 79827116.

61172897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-61172897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61172899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 650729 + ... + 650822.

It is an arithmetic number, because the mean of its divisors is an integer number (15618624).

Almost surely, 2^61172897 is an apocalyptic number.

It is an amenable number.

61172897 is a deficient number, since it is larger than the sum of its proper divisors (1301599).

61172897 is a wasteful number, since it uses less digits than its factorization.

61172897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301598.

The product of its digits is 42336, while the sum is 41.

The square root of 61172897 is about 7821.3104400733. The cubic root of 61172897 is about 394.0212847202.

The spelling of 61172897 in words is "sixty-one million, one hundred seventy-two thousand, eight hundred ninety-seven".