147990972917 has 4 divisors (see below), whose sum is σ = 148001841900. Its totient is φ = 147980103936.

The previous prime is 147990972911. The next prime is 147990972923. The reversal of 147990972917 is 719279099741.

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

It is an interprime number because it is at equal distance from previous prime (147990972911) and next prime (147990972923).

It can be written as a sum of positive squares in 2 ways, for example, as 102293787556 + 45697185361 = 319834^2 + 213769^2 .

It is a cyclic number.

It is not a de Polignac number, because 147990972917 - 2²⁸ = 147722537461 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 (147990972911) 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, 5414042 + ... + 5441307.

It is an arithmetic number, because the mean of its divisors is an integer number (37000460475).

Almost surely, 2^147990972917 is an apocalyptic number.

It is an amenable number.

147990972917 is a deficient number, since it is larger than the sum of its proper divisors (10868983).

147990972917 is a wasteful number, since it uses less digits than its factorization.

147990972917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10868982.

The product of its (nonzero) digits is 18003384, while the sum is 65.

The spelling of 147990972917 in words is "one hundred forty-seven billion, nine hundred ninety million, nine hundred seventy-two thousand, nine hundred seventeen".