138535651 has 2 divisors, whose sum is σ = 138535652. Its totient is φ = 138535650.

The previous prime is 138535613. The next prime is 138535667. The reversal of 138535651 is 156535831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138535651 - 2⁹ = 138535139 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 138535651.

It is not a weakly prime, because it can be changed into another prime (138535681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69267825 + 69267826.

It is an arithmetic number, because the mean of its divisors is an integer number (69267826).

Almost surely, 2^138535651 is an apocalyptic number.

138535651 is a deficient number, since it is larger than the sum of its proper divisors (1).

138535651 is an equidigital number, since it uses as much as digits as its factorization.

138535651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54000, while the sum is 37.

The square root of 138535651 is about 11770.1168643306. The cubic root of 138535651 is about 517.4326746958.

The spelling of 138535651 in words is "one hundred thirty-eight million, five hundred thirty-five thousand, six hundred fifty-one".