138483497 has 4 divisors (see below), whose sum is σ = 143258820. Its totient is φ = 133708176.

The previous prime is 138483473. The next prime is 138483511. The reversal of 138483497 is 794384831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 794384831 = 433 ⋅1834607.

It can be written as a sum of positive squares in 2 ways, for example, as 53640976 + 84842521 = 7324^2 + 9211^2 .

It is a cyclic number.

It is not a de Polignac number, because 138483497 - 2¹² = 138479401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138483997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2387618 + ... + 2387675.

It is an arithmetic number, because the mean of its divisors is an integer number (35814705).

Almost surely, 2^138483497 is an apocalyptic number.

It is an amenable number.

138483497 is a deficient number, since it is larger than the sum of its proper divisors (4775323).

138483497 is an equidigital number, since it uses as much as digits as its factorization.

138483497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4775322.

The product of its digits is 580608, while the sum is 47.

The square root of 138483497 is about 11767.9011297682. The cubic root of 138483497 is about 517.3677345626.

The spelling of 138483497 in words is "one hundred thirty-eight million, four hundred eighty-three thousand, four hundred ninety-seven".