99745897 has 4 divisors (see below), whose sum is σ = 100098640. Its totient is φ = 99393156.

The previous prime is 99745861. The next prime is 99745903. The reversal of 99745897 is 79854799.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79854799 = 2011 ⋅39709.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99745897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99745847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175947 + ... + 176512.

It is an arithmetic number, because the mean of its divisors is an integer number (25024660).

Almost surely, 2^99745897 is an apocalyptic number.

It is an amenable number.

99745897 is a deficient number, since it is larger than the sum of its proper divisors (352743).

99745897 is a wasteful number, since it uses less digits than its factorization.

99745897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352742.

The product of its digits is 5715360, while the sum is 58.

The square root of 99745897 is about 9987.2867686875. The cubic root of 99745897 is about 463.7654026750.

The spelling of 99745897 in words is "ninety-nine million, seven hundred forty-five thousand, eight hundred ninety-seven".