99173797 has 2 divisors, whose sum is σ = 99173798. Its totient is φ = 99173796.

The previous prime is 99173783. The next prime is 99173821. The reversal of 99173797 is 79737199.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95277121 + 3896676 = 9761^2 + 1974^2 .

It is an emirp because it is prime and its reverse (79737199) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99173797 is a prime.

It is a super-2 number, since 2×99173797² = 19670884022794418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99173747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49586898 + 49586899.

It is an arithmetic number, because the mean of its divisors is an integer number (49586899).

Almost surely, 2^99173797 is an apocalyptic number.

It is an amenable number.

99173797 is a deficient number, since it is larger than the sum of its proper divisors (1).

99173797 is an equidigital number, since it uses as much as digits as its factorization.

99173797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 750141, while the sum is 52.

The square root of 99173797 is about 9958.6041692599. The cubic root of 99173797 is about 462.8770484604.

The spelling of 99173797 in words is "ninety-nine million, one hundred seventy-three thousand, seven hundred ninety-seven".