123988951 has 2 divisors, whose sum is σ = 123988952. Its totient is φ = 123988950.

The previous prime is 123988937. The next prime is 123989017. The reversal of 123988951 is 159889321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123988951 - 2¹¹ = 123986903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123988901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61994475 + 61994476.

It is an arithmetic number, because the mean of its divisors is an integer number (61994476).

Almost surely, 2^123988951 is an apocalyptic number.

123988951 is a deficient number, since it is larger than the sum of its proper divisors (1).

123988951 is an equidigital number, since it uses as much as digits as its factorization.

123988951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 46.

The square root of 123988951 is about 11135.0325998625. The cubic root of 123988951 is about 498.6482836857.

The spelling of 123988951 in words is "one hundred twenty-three million, nine hundred eighty-eight thousand, nine hundred fifty-one".