1999947095 has 4 divisors (see below), whose sum is σ = 2399936520. Its totient is φ = 1599957672.

The previous prime is 1999947091. The next prime is 1999947107. The reversal of 1999947095 is 5907499991.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1999947095 - 2² = 1999947091 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999947091) 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, 199994705 + ... + 199994714.

It is an arithmetic number, because the mean of its divisors is an integer number (599984130).

Almost surely, 2^1999947095 is an apocalyptic number.

1999947095 is a deficient number, since it is larger than the sum of its proper divisors (399989425).

1999947095 is an equidigital number, since it uses as much as digits as its factorization.

1999947095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399989424.

The product of its (nonzero) digits is 8266860, while the sum is 62.

The square root of 1999947095 is about 44720.7680502024. The cubic root of 1999947095 is about 1259.9099404431.

The spelling of 1999947095 in words is "one billion, nine hundred ninety-nine million, nine hundred forty-seven thousand, ninety-five".