61097457 has 4 divisors (see below), whose sum is σ = 81463280. Its totient is φ = 40731636.

The previous prime is 61097441. The next prime is 61097537. The reversal of 61097457 is 75479016.

61097457 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 not a de Polignac number, because 61097457 - 2⁴ = 61097441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61097357) 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, 10182907 + ... + 10182912.

It is an arithmetic number, because the mean of its divisors is an integer number (20365820).

Almost surely, 2^61097457 is an apocalyptic number.

It is an amenable number.

61097457 is a deficient number, since it is larger than the sum of its proper divisors (20365823).

61097457 is a wasteful number, since it uses less digits than its factorization.

61097457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20365822.

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 61097457 is about 7816.4862310376. The cubic root of 61097457 is about 393.8592456760.

The spelling of 61097457 in words is "sixty-one million, ninety-seven thousand, four hundred fifty-seven".