994991597 has 2 divisors, whose sum is σ = 994991598. Its totient is φ = 994991596.

The previous prime is 994991581. The next prime is 994991611. The reversal of 994991597 is 795199499.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 949009636 + 45981961 = 30806^2 + 6781^2 .

It is an emirp because it is prime and its reverse (795199499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 994991597 - 2⁴ = 994991581 is a prime.

It is a super-2 number, since 2×994991597² = 1980016556201220818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (994991507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497495798 + 497495799.

It is an arithmetic number, because the mean of its divisors is an integer number (497495799).

Almost surely, 2^994991597 is an apocalyptic number.

It is an amenable number.

994991597 is a deficient number, since it is larger than the sum of its proper divisors (1).

994991597 is an equidigital number, since it uses as much as digits as its factorization.

994991597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8266860, while the sum is 62.

The square root of 994991597 is about 31543.4873943894. The cubic root of 994991597 is about 998.3277374300.

The spelling of 994991597 in words is "nine hundred ninety-four million, nine hundred ninety-one thousand, five hundred ninety-seven".