195477993 has 12 divisors (see below), whose sum is σ = 289988868. Its totient is φ = 126796320.

The previous prime is 195477973. The next prime is 195478001. The reversal of 195477993 is 399774591.

It is a happy number.

195477993 is a `hidden beast` number, since 1 + 9 + 547 + 7 + 9 + 93 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 83393424 + 112084569 = 9132^2 + 10587^2 .

It is not a de Polignac number, because 195477993 - 2¹² = 195473897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (195477923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 293178 + ... + 293843.

It is an arithmetic number, because the mean of its divisors is an integer number (24165739).

Almost surely, 2^195477993 is an apocalyptic number.

It is an amenable number.

195477993 is a deficient number, since it is larger than the sum of its proper divisors (94510875).

195477993 is a wasteful number, since it uses less digits than its factorization.

195477993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587064 (or 587061 counting only the distinct ones).

The product of its digits is 2143260, while the sum is 54.

The square root of 195477993 is about 13981.3444632482. The cubic root of 195477993 is about 580.3624300374.

The spelling of 195477993 in words is "one hundred ninety-five million, four hundred seventy-seven thousand, nine hundred ninety-three".