138698762 has 4 divisors (see below), whose sum is σ = 208048146. Its totient is φ = 69349380.

The previous prime is 138698741. The next prime is 138698773. The reversal of 138698762 is 267896831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 136445761 + 2253001 = 11681^2 + 1501^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 138698762.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34674689 + ... + 34674692.

Almost surely, 2^138698762 is an apocalyptic number.

138698762 is a deficient number, since it is larger than the sum of its proper divisors (69349384).

138698762 is an equidigital number, since it uses as much as digits as its factorization.

138698762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69349383.

The product of its digits is 870912, while the sum is 50.

The square root of 138698762 is about 11777.0438565881. The cubic root of 138698762 is about 517.6356690357.

The spelling of 138698762 in words is "one hundred thirty-eight million, six hundred ninety-eight thousand, seven hundred sixty-two".