123381537 has 16 divisors (see below), whose sum is σ = 166932480. Its totient is φ = 81050832.

The previous prime is 123381527. The next prime is 123381541. The reversal of 123381537 is 735183321.

It is not a de Polignac number, because 123381537 - 2⁴ = 123381521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123381498 and 123381507.

It is not an unprimeable number, because it can be changed into a prime (123381527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69264 + ... + 71022.

It is an arithmetic number, because the mean of its divisors is an integer number (10433280).

Almost surely, 2^123381537 is an apocalyptic number.

It is an amenable number.

123381537 is a deficient number, since it is larger than the sum of its proper divisors (43550943).

123381537 is a wasteful number, since it uses less digits than its factorization.

123381537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2092.

The product of its digits is 15120, while the sum is 33.

The square root of 123381537 is about 11107.7242043544. The cubic root of 123381537 is about 497.8326682538.

The spelling of 123381537 in words is "one hundred twenty-three million, three hundred eighty-one thousand, five hundred thirty-seven".