99771101 has 4 divisors (see below), whose sum is σ = 99904704. Its totient is φ = 99637500.

The previous prime is 99771097. The next prime is 99771103. The reversal of 99771101 is 10117799.

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: 10117799 = 307 ⋅32957.

It is a cyclic number.

It is not a de Polignac number, because 99771101 - 2² = 99771097 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 (99771103) 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, 65675 + ... + 67176.

It is an arithmetic number, because the mean of its divisors is an integer number (24976176).

Almost surely, 2^99771101 is an apocalyptic number.

It is an amenable number.

99771101 is a deficient number, since it is larger than the sum of its proper divisors (133603).

99771101 is a wasteful number, since it uses less digits than its factorization.

99771101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133602.

The product of its (nonzero) digits is 3969, while the sum is 35.

The square root of 99771101 is about 9988.5484931495. The cubic root of 99771101 is about 463.8044611198.

The spelling of 99771101 in words is "ninety-nine million, seven hundred seventy-one thousand, one hundred one".