38123531 has 2 divisors, whose sum is σ = 38123532. Its totient is φ = 38123530.

The previous prime is 38123497. The next prime is 38123573. The reversal of 38123531 is 13532183.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38123531 is a prime.

It is a super-2 number, since 2×38123531² = 2906807231815922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38123531.

It is not a weakly prime, because it can be changed into another prime (38126531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19061765 + 19061766.

It is an arithmetic number, because the mean of its divisors is an integer number (19061766).

Almost surely, 2^38123531 is an apocalyptic number.

38123531 is a deficient number, since it is larger than the sum of its proper divisors (1).

38123531 is an equidigital number, since it uses as much as digits as its factorization.

38123531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 38123531 is about 6174.4255603254. The cubic root of 38123531 is about 336.5614520526.

The spelling of 38123531 in words is "thirty-eight million, one hundred twenty-three thousand, five hundred thirty-one".