99770071 has 4 divisors (see below), whose sum is σ = 99825544. Its totient is φ = 99714600.

The previous prime is 99770053. The next prime is 99770089. The reversal of 99770071 is 17007799.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17007799 = 733 ⋅23203.

It is an interprime number because it is at equal distance from previous prime (99770053) and next prime (99770089).

It is a cyclic number.

It is not a de Polignac number, because 99770071 - 2⁹ = 99769559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99770971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24945 + ... + 28666.

It is an arithmetic number, because the mean of its divisors is an integer number (24956386).

Almost surely, 2^99770071 is an apocalyptic number.

99770071 is a deficient number, since it is larger than the sum of its proper divisors (55473).

99770071 is a wasteful number, since it uses less digits than its factorization.

99770071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55472.

The product of its (nonzero) digits is 27783, while the sum is 40.

The square root of 99770071 is about 9988.4969339736. The cubic root of 99770071 is about 463.8028650656.

The spelling of 99770071 in words is "ninety-nine million, seven hundred seventy thousand, seventy-one".