61577123 has 2 divisors, whose sum is σ = 61577124. Its totient is φ = 61577122.

The previous prime is 61577107. The next prime is 61577143. The reversal of 61577123 is 32177516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61577123 - 2⁴ = 61577107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61577123.

It is not a weakly prime, because it can be changed into another prime (61577143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30788561 + 30788562.

It is an arithmetic number, because the mean of its divisors is an integer number (30788562).

Almost surely, 2^61577123 is an apocalyptic number.

61577123 is a deficient number, since it is larger than the sum of its proper divisors (1).

61577123 is an equidigital number, since it uses as much as digits as its factorization.

61577123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8820, while the sum is 32.

The square root of 61577123 is about 7847.1092129522. The cubic root of 61577123 is about 394.8872679418.

The spelling of 61577123 in words is "sixty-one million, five hundred seventy-seven thousand, one hundred twenty-three".