1995479137 has 4 divisors (see below), whose sum is σ = 2002289940. Its totient is φ = 1988668336.

The previous prime is 1995479131. The next prime is 1995479147. The reversal of 1995479137 is 7319745991.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1465052176 + 530426961 = 38276^2 + 23031^2 .

It is a cyclic number.

It is not a de Polignac number, because 1995479137 - 2²³ = 1987090529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1995479131) 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, 3404962 + ... + 3405547.

It is an arithmetic number, because the mean of its divisors is an integer number (500572485).

Almost surely, 2^1995479137 is an apocalyptic number.

It is an amenable number.

1995479137 is a deficient number, since it is larger than the sum of its proper divisors (6810803).

1995479137 is an equidigital number, since it uses as much as digits as its factorization.

1995479137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6810802.

The product of its digits is 2143260, while the sum is 55.

The square root of 1995479137 is about 44670.7861694867. The cubic root of 1995479137 is about 1258.9710119601.

The spelling of 1995479137 in words is "one billion, nine hundred ninety-five million, four hundred seventy-nine thousand, one hundred thirty-seven".