139072747 has 8 divisors (see below), whose sum is σ = 152911872. Its totient is φ = 125433000.

The previous prime is 139072721. The next prime is 139072781. The reversal of 139072747 is 747270931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 139072747 - 2¹¹ = 139070699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139072147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48379 + ... + 51172.

It is an arithmetic number, because the mean of its divisors is an integer number (19113984).

Almost surely, 2^139072747 is an apocalyptic number.

139072747 is a deficient number, since it is larger than the sum of its proper divisors (13839125).

139072747 is a wasteful number, since it uses less digits than its factorization.

139072747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99689.

The product of its (nonzero) digits is 74088, while the sum is 40.

The square root of 139072747 is about 11792.9108789985. The cubic root of 139072747 is about 518.1004995246.

The spelling of 139072747 in words is "one hundred thirty-nine million, seventy-two thousand, seven hundred forty-seven".