1995131677 has 12 divisors (see below), whose sum is σ = 2531856096. Its totient is φ = 1554647640.

The previous prime is 1995131659. The next prime is 1995131681. The reversal of 1995131677 is 7761315991.

It is not a de Polignac number, because 1995131677 - 2⁷ = 1995131549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 1995131677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1995131617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1850233 + ... + 1851310.

It is an arithmetic number, because the mean of its divisors is an integer number (210988008).

Almost surely, 2^1995131677 is an apocalyptic number.

It is an amenable number.

1995131677 is a deficient number, since it is larger than the sum of its proper divisors (536724419).

1995131677 is a wasteful number, since it uses less digits than its factorization.

1995131677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3701568 (or 3701561 counting only the distinct ones).

The product of its digits is 357210, while the sum is 49.

The square root of 1995131677 is about 44666.8968812475. The cubic root of 1995131677 is about 1258.8979355325.

The spelling of 1995131677 in words is "one billion, nine hundred ninety-five million, one hundred thirty-one thousand, six hundred seventy-seven".