147505993 has 2 divisors, whose sum is σ = 147505994. Its totient is φ = 147505992.

The previous prime is 147505973. The next prime is 147506071. The reversal of 147505993 is 399505741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143808064 + 3697929 = 11992^2 + 1923^2 .

It is a cyclic number.

It is not a de Polignac number, because 147505993 - 2⁵ = 147505961 is a prime.

It is not a weakly prime, because it can be changed into another prime (147505913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73752996 + 73752997.

It is an arithmetic number, because the mean of its divisors is an integer number (73752997).

Almost surely, 2^147505993 is an apocalyptic number.

It is an amenable number.

147505993 is a deficient number, since it is larger than the sum of its proper divisors (1).

147505993 is an equidigital number, since it uses as much as digits as its factorization.

147505993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 170100, while the sum is 43.

The square root of 147505993 is about 12145.2045268904. The cubic root of 147505993 is about 528.3680583898.

The spelling of 147505993 in words is "one hundred forty-seven million, five hundred five thousand, nine hundred ninety-three".