123884557 has 2 divisors, whose sum is σ = 123884558. Its totient is φ = 123884556.

The previous prime is 123884543. The next prime is 123884573. The reversal of 123884557 is 755488321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120428676 + 3455881 = 10974^2 + 1859^2 .

It is a cyclic number.

It is not a de Polignac number, because 123884557 - 2¹⁹ = 123360269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123884357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61942278 + 61942279.

It is an arithmetic number, because the mean of its divisors is an integer number (61942279).

Almost surely, 2^123884557 is an apocalyptic number.

It is an amenable number.

123884557 is a deficient number, since it is larger than the sum of its proper divisors (1).

123884557 is an equidigital number, since it uses as much as digits as its factorization.

123884557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 268800, while the sum is 43.

The square root of 123884557 is about 11130.3439749183. The cubic root of 123884557 is about 498.5082967351.

The spelling of 123884557 in words is "one hundred twenty-three million, eight hundred eighty-four thousand, five hundred fifty-seven".