123761389 has 2 divisors, whose sum is σ = 123761390. Its totient is φ = 123761388.

The previous prime is 123761381. The next prime is 123761399. The reversal of 123761389 is 983167321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88454025 + 35307364 = 9405^2 + 5942^2 .

It is a cyclic number.

It is not a de Polignac number, because 123761389 - 2³ = 123761381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123761381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61880694 + 61880695.

It is an arithmetic number, because the mean of its divisors is an integer number (61880695).

Almost surely, 2^123761389 is an apocalyptic number.

It is an amenable number.

123761389 is a deficient number, since it is larger than the sum of its proper divisors (1).

123761389 is an equidigital number, since it uses as much as digits as its factorization.

123761389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 123761389 is about 11124.8096163485. The cubic root of 123761389 is about 498.3430336574.

It can be divided in two parts, 1237 and 61389, that added together give a palindrome (62626).

The spelling of 123761389 in words is "one hundred twenty-three million, seven hundred sixty-one thousand, three hundred eighty-nine".