995383340721 has 135 divisors (see below), whose sum is σ = 1846642728203. Its totient is φ = 516244196160.

The previous prime is 995383340593. The next prime is 995383340741. The reversal of 995383340721 is 127043383599.

The square root of 995383340721 is 997689.

It is a perfect power (a square), and thus also a powerful number.

995383340721 is a `hidden beast` number, since 9 + 9 + 538 + 3 + 34 + 0 + 72 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 28826946225 + 966556394496 = 169785^2 + 983136^2 .

It is not a de Polignac number, because 995383340721 - 2⁷ = 995383340593 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (995383340741) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 1613262805 + ... + 1613263421.

Almost surely, 2^995383340721 is an apocalyptic number.

995383340721 is the 997689-th square number.

995383340721 is the 498845-th centered octagonal number.

It is an amenable number.

995383340721 is a deficient number, since it is larger than the sum of its proper divisors (851259387482).

995383340721 is an frugal number, since it uses more digits than its factorization.

995383340721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290 (or 638 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 54.

The spelling of 995383340721 in words is "nine hundred ninety-five billion, three hundred eighty-three million, three hundred forty thousand, seven hundred twenty-one".