995557817 has 2 divisors, whose sum is σ = 995557818. Its totient is φ = 995557816.

The previous prime is 995557813. The next prime is 995557841. The reversal of 995557817 is 718755599.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 982132921 + 13424896 = 31339^2 + 3664^2 .

It is a cyclic number.

It is not a de Polignac number, because 995557817 - 2² = 995557813 is a prime.

It is a super-2 number, since 2×995557817² = 1982270733979610978, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (995557813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497778908 + 497778909.

It is an arithmetic number, because the mean of its divisors is an integer number (497778909).

Almost surely, 2^995557817 is an apocalyptic number.

It is an amenable number.

995557817 is a deficient number, since it is larger than the sum of its proper divisors (1).

995557817 is an equidigital number, since it uses as much as digits as its factorization.

995557817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3969000, while the sum is 56.

The square root of 995557817 is about 31552.4613461454. The cubic root of 995557817 is about 998.5170743519.

The spelling of 995557817 in words is "nine hundred ninety-five million, five hundred fifty-seven thousand, eight hundred seventeen".