99994157 has 2 divisors, whose sum is σ = 99994158. Its totient is φ = 99994156.

The previous prime is 99994129. The next prime is 99994177. The reversal of 99994157 is 75149999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71808676 + 28185481 = 8474^2 + 5309^2 .

It is an emirp because it is prime and its reverse (75149999) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99994157 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 99994099 and 99994108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99994177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49997078 + 49997079.

It is an arithmetic number, because the mean of its divisors is an integer number (49997079).

Almost surely, 2^99994157 is an apocalyptic number.

It is an amenable number.

99994157 is a deficient number, since it is larger than the sum of its proper divisors (1).

99994157 is an equidigital number, since it uses as much as digits as its factorization.

99994157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 918540, while the sum is 53.

The square root of 99994157 is about 9999.7078457323. The cubic root of 99994157 is about 464.1498429173.

The spelling of 99994157 in words is "ninety-nine million, nine hundred ninety-four thousand, one hundred fifty-seven".