195800537 has 4 divisors (see below), whose sum is σ = 197229876. Its totient is φ = 194371200.

The previous prime is 195800533. The next prime is 195800581. The reversal of 195800537 is 735008591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 735008591 = 26423 ⋅27817.

It can be written as a sum of positive squares in 2 ways, for example, as 145829776 + 49970761 = 12076^2 + 7069^2 .

It is a cyclic number.

It is not a de Polignac number, because 195800537 - 2² = 195800533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 195800537.

It is not an unprimeable number, because it can be changed into a prime (195800533) 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, 714464 + ... + 714737.

It is an arithmetic number, because the mean of its divisors is an integer number (49307469).

Almost surely, 2^195800537 is an apocalyptic number.

It is an amenable number.

195800537 is a deficient number, since it is larger than the sum of its proper divisors (1429339).

195800537 is a wasteful number, since it uses less digits than its factorization.

195800537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429338.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 195800537 is about 13992.8745081202. The cubic root of 195800537 is about 580.6814592258.

The spelling of 195800537 in words is "one hundred ninety-five million, eight hundred thousand, five hundred thirty-seven".