61577143 has 2 divisors, whose sum is σ = 61577144. Its totient is φ = 61577142.

The previous prime is 61577123. The next prime is 61577171. The reversal of 61577143 is 34177516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61577143 - 2⁹ = 61576631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61577099 and 61577108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61577123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30788571 + 30788572.

It is an arithmetic number, because the mean of its divisors is an integer number (30788572).

Almost surely, 2^61577143 is an apocalyptic number.

61577143 is a deficient number, since it is larger than the sum of its proper divisors (1).

61577143 is an equidigital number, since it uses as much as digits as its factorization.

61577143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 34.

The square root of 61577143 is about 7847.1104873068. The cubic root of 61577143 is about 394.8873106944.

The spelling of 61577143 in words is "sixty-one million, five hundred seventy-seven thousand, one hundred forty-three".