99770077 has 4 divisors (see below), whose sum is σ = 108840096. Its totient is φ = 90700060.

The previous prime is 99770053. The next prime is 99770089. The reversal of 99770077 is 77007799.

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.

It is not a de Polignac number, because 99770077 - 2⁷ = 99769949 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99770017) 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, 4534993 + ... + 4535014.

It is an arithmetic number, because the mean of its divisors is an integer number (27210024).

Almost surely, 2^99770077 is an apocalyptic number.

It is an amenable number.

99770077 is a deficient number, since it is larger than the sum of its proper divisors (9070019).

99770077 is a wasteful number, since it uses less digits than its factorization.

99770077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9070018.

The product of its (nonzero) digits is 194481, while the sum is 46.

The square root of 99770077 is about 9988.4972343191. The cubic root of 99770077 is about 463.8028743631.

The spelling of 99770077 in words is "ninety-nine million, seven hundred seventy thousand, seventy-seven".