139222747 has 4 divisors (see below), whose sum is σ = 146550280. Its totient is φ = 131895216.

The previous prime is 139222697. The next prime is 139222763. The reversal of 139222747 is 747222931.

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

It is a cyclic number.

It is not a de Polignac number, because 139222747 - 2¹¹ = 139220699 is a prime.

It is a super-3 number, since 3×139222747³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139222247) 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, 3663738 + ... + 3663775.

It is an arithmetic number, because the mean of its divisors is an integer number (36637570).

Almost surely, 2^139222747 is an apocalyptic number.

139222747 is a deficient number, since it is larger than the sum of its proper divisors (7327533).

139222747 is an equidigital number, since it uses as much as digits as its factorization.

139222747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7327532.

The product of its digits is 42336, while the sum is 37.

The square root of 139222747 is about 11799.2689180305. The cubic root of 139222747 is about 518.2867021965.

The spelling of 139222747 in words is "one hundred thirty-nine million, two hundred twenty-two thousand, seven hundred forty-seven".