1985195741 has 4 divisors (see below), whose sum is σ = 1996286400. Its totient is φ = 1974105084.

The previous prime is 1985195731. The next prime is 1985195761. The reversal of 1985195741 is 1475915891.

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 not a de Polignac number, because 1985195741 - 2²² = 1981001437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1985195741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985195731) 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, 5545061 + ... + 5545418.

It is an arithmetic number, because the mean of its divisors is an integer number (499071600).

Almost surely, 2^1985195741 is an apocalyptic number.

It is an amenable number.

1985195741 is a deficient number, since it is larger than the sum of its proper divisors (11090659).

1985195741 is a wasteful number, since it uses less digits than its factorization.

1985195741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11090658.

The product of its digits is 453600, while the sum is 50.

The square root of 1985195741 is about 44555.5354697932. The cubic root of 1985195741 is about 1256.8046482730.

The spelling of 1985195741 in words is "one billion, nine hundred eighty-five million, one hundred ninety-five thousand, seven hundred forty-one".