123972577 has 2 divisors, whose sum is σ = 123972578. Its totient is φ = 123972576.

The previous prime is 123972547. The next prime is 123972601. The reversal of 123972577 is 775279321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123676641 + 295936 = 11121^2 + 544^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123972577 is a prime.

It is not a weakly prime, because it can be changed into another prime (123972547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61986288 + 61986289.

It is an arithmetic number, because the mean of its divisors is an integer number (61986289).

Almost surely, 2^123972577 is an apocalyptic number.

It is an amenable number.

123972577 is a deficient number, since it is larger than the sum of its proper divisors (1).

123972577 is an equidigital number, since it uses as much as digits as its factorization.

123972577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 185220, while the sum is 43.

The square root of 123972577 is about 11134.2973285250. The cubic root of 123972577 is about 498.6263321963.

The spelling of 123972577 in words is "one hundred twenty-three million, nine hundred seventy-two thousand, five hundred seventy-seven".