99977243 has 4 divisors (see below), whose sum is σ = 100054248. Its totient is φ = 99900240.

The previous prime is 99977233. The next prime is 99977249. The reversal of 99977243 is 34277999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99977243 - 2⁶ = 99977179 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99977191 and 99977200.

It is not an unprimeable number, because it can be changed into a prime (99977249) 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, 36521 + ... + 39162.

It is an arithmetic number, because the mean of its divisors is an integer number (25013562).

Almost surely, 2^99977243 is an apocalyptic number.

99977243 is a deficient number, since it is larger than the sum of its proper divisors (77005).

99977243 is a wasteful number, since it uses less digits than its factorization.

99977243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77004.

The product of its digits is 857304, while the sum is 50.

The square root of 99977243 is about 9998.8620852575. The cubic root of 99977243 is about 464.1236711444.

The spelling of 99977243 in words is "ninety-nine million, nine hundred seventy-seven thousand, two hundred forty-three".