123381487 has 2 divisors, whose sum is σ = 123381488. Its totient is φ = 123381486.

The previous prime is 123381473. The next prime is 123381521. The reversal of 123381487 is 784183321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123381487 - 2¹¹ = 123379439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123381287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61690743 + 61690744.

It is an arithmetic number, because the mean of its divisors is an integer number (61690744).

Almost surely, 2^123381487 is an apocalyptic number.

123381487 is a deficient number, since it is larger than the sum of its proper divisors (1).

123381487 is an equidigital number, since it uses as much as digits as its factorization.

123381487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 37.

The square root of 123381487 is about 11107.7219536681. The cubic root of 123381487 is about 497.8326010053.

The spelling of 123381487 in words is "one hundred twenty-three million, three hundred eighty-one thousand, four hundred eighty-seven".