138453571 has 2 divisors, whose sum is σ = 138453572. Its totient is φ = 138453570.

The previous prime is 138453563. The next prime is 138453577. The reversal of 138453571 is 175354831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138453571 - 2³ = 138453563 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138453571.

It is not a weakly prime, because it can be changed into another prime (138453577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69226785 + 69226786.

It is an arithmetic number, because the mean of its divisors is an integer number (69226786).

Almost surely, 2^138453571 is an apocalyptic number.

138453571 is a deficient number, since it is larger than the sum of its proper divisors (1).

138453571 is an equidigital number, since it uses as much as digits as its factorization.

138453571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 37.

The square root of 138453571 is about 11766.6295514051. The cubic root of 138453571 is about 517.3304645087.

The spelling of 138453571 in words is "one hundred thirty-eight million, four hundred fifty-three thousand, five hundred seventy-one".