1995099643 has 4 divisors (see below), whose sum is σ = 2059457728. Its totient is φ = 1930741560.

The previous prime is 1995099629. The next prime is 1995099653. The reversal of 1995099643 is 3469905991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3469905991 = 37 ⋅93781243.

It is a cyclic number.

It is not a de Polignac number, because 1995099643 - 2⁹ = 1995099131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1995099653) 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, 32178996 + ... + 32179057.

It is an arithmetic number, because the mean of its divisors is an integer number (514864432).

Almost surely, 2^1995099643 is an apocalyptic number.

1995099643 is a deficient number, since it is larger than the sum of its proper divisors (64358085).

1995099643 is an equidigital number, since it uses as much as digits as its factorization.

1995099643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64358084.

The product of its (nonzero) digits is 2361960, while the sum is 55.

The square root of 1995099643 is about 44666.5382921041. The cubic root of 1995099643 is about 1258.8911978398.

The spelling of 1995099643 in words is "one billion, nine hundred ninety-five million, ninety-nine thousand, six hundred forty-three".