147991807 has 8 divisors (see below), whose sum is σ = 150757200. Its totient is φ = 145252224.

The previous prime is 147991801. The next prime is 147991829. The reversal of 147991807 is 708199741.

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

It is a cyclic number.

It is not a de Polignac number, because 147991807 - 2¹⁵ = 147959039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147991801) 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, 5319 + ... + 18007.

It is an arithmetic number, because the mean of its divisors is an integer number (18844650).

Almost surely, 2^147991807 is an apocalyptic number.

147991807 is a deficient number, since it is larger than the sum of its proper divisors (2765393).

147991807 is a wasteful number, since it uses less digits than its factorization.

147991807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12905.

The product of its (nonzero) digits is 127008, while the sum is 46.

The square root of 147991807 is about 12165.1883257104. The cubic root of 147991807 is about 528.9474863985.

The spelling of 147991807 in words is "one hundred forty-seven million, nine hundred ninety-one thousand, eight hundred seven".