147998905 has 24 divisors (see below), whose sum is σ = 190732608. Its totient is φ = 109978176.

The previous prime is 147998897. The next prime is 147998933. The reversal of 147998905 is 509899741.

It is not a de Polignac number, because 147998905 - 2³ = 147998897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 855399 + ... + 855571.

It is an arithmetic number, because the mean of its divisors is an integer number (7947192).

Almost surely, 2^147998905 is an apocalyptic number.

It is an amenable number.

147998905 is a deficient number, since it is larger than the sum of its proper divisors (42733703).

147998905 is an equidigital number, since it uses as much as digits as its factorization.

147998905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 52.

The square root of 147998905 is about 12165.4800562904. The cubic root of 147998905 is about 528.9559427433.

The spelling of 147998905 in words is "one hundred forty-seven million, nine hundred ninety-eight thousand, nine hundred five".