1995042137 has 4 divisors (see below), whose sum is σ = 2176409616. Its totient is φ = 1813674660.

The previous prime is 1995042113. The next prime is 1995042163. The reversal of 1995042137 is 7312405991.

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 1995042137 - 2¹² = 1995038041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1995042094 and 1995042103.

It is not an unprimeable number, because it can be changed into a prime (1995042187) 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, 90683723 + ... + 90683744.

It is an arithmetic number, because the mean of its divisors is an integer number (544102404).

Almost surely, 2^1995042137 is an apocalyptic number.

It is an amenable number.

1995042137 is a deficient number, since it is larger than the sum of its proper divisors (181367479).

1995042137 is a wasteful number, since it uses less digits than its factorization.

1995042137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181367478.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 1995042137 is about 44665.8945617347. The cubic root of 1995042137 is about 1258.8791024552.

The spelling of 1995042137 in words is "one billion, nine hundred ninety-five million, forty-two thousand, one hundred thirty-seven".