61097143 has 4 divisors (see below), whose sum is σ = 61228440. Its totient is φ = 60965848.

The previous prime is 61097129. The next prime is 61097159. The reversal of 61097143 is 34179016.

It is a happy number.

61097143 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61097143 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61091143) 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, 64948 + ... + 65881.

It is an arithmetic number, because the mean of its divisors is an integer number (15307110).

Almost surely, 2^61097143 is an apocalyptic number.

61097143 is a deficient number, since it is larger than the sum of its proper divisors (131297).

61097143 is a wasteful number, since it uses less digits than its factorization.

61097143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131296.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 61097143 is about 7816.4661452603. The cubic root of 61097143 is about 393.8585709506.

The spelling of 61097143 in words is "sixty-one million, ninety-seven thousand, one hundred forty-three".