147998917 has 4 divisors (see below), whose sum is σ = 161453376. Its totient is φ = 134544460.

The previous prime is 147998897. The next prime is 147998933. The reversal of 147998917 is 719899741.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-147998917 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 (147998117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6727213 + ... + 6727234.

It is an arithmetic number, because the mean of its divisors is an integer number (40363344).

Almost surely, 2^147998917 is an apocalyptic number.

It is an amenable number.

147998917 is a deficient number, since it is larger than the sum of its proper divisors (13454459).

147998917 is a wasteful number, since it uses less digits than its factorization.

147998917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13454458.

The product of its digits is 1143072, while the sum is 55.

The square root of 147998917 is about 12165.4805494892. The cubic root of 147998917 is about 528.9559570395.

It can be divided in two parts, 14799 and 8917, that added together give a square (23716 = 154²).

The spelling of 147998917 in words is "one hundred forty-seven million, nine hundred ninety-eight thousand, nine hundred seventeen".