69247138 has 4 divisors (see below), whose sum is σ = 103870710. Its totient is φ = 34623568.

The previous prime is 69247109. The next prime is 69247141. The reversal of 69247138 is 83174296.

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., 68442529 + 804609 = 8273^2 + 897^2 .

It is a super-2 number, since 2×69247138² = 9590332242382088, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 69247138.

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, 17311783 + ... + 17311786.

Almost surely, 2^69247138 is an apocalyptic number.

69247138 is a deficient number, since it is larger than the sum of its proper divisors (34623572).

69247138 is a wasteful number, since it uses less digits than its factorization.

69247138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34623571.

The product of its digits is 72576, while the sum is 40.

The square root of 69247138 is about 8321.4865258558. The cubic root of 69247138 is about 410.6456968348.

The spelling of 69247138 in words is "sixty-nine million, two hundred forty-seven thousand, one hundred thirty-eight".