99977369 has 8 divisors (see below), whose sum is σ = 101760360.
Its totient is φ = 98224128.
The previous prime is 99977363. The next prime is 99977377. The reversal of 99977369 is 96377999.
It can be written as a sum of positive squares in 4 ways, for example, as 17530969 + 82446400 = 4187^2 + 9080^2
It is a de Polignac number, because none of the positive numbers 2k-99977369 is a prime.
It is a super-2 number, since 2×999773692 = 19990948624324322, which contains 22 as substring.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (99977363) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388889 + ... + 389145.
It is an arithmetic number, because the mean of its divisors is an integer number (12720045).
Almost surely, 299977369 is an apocalyptic number.
It is an amenable number.
99977369 is a deficient number, since it is larger than the sum of its proper divisors (1782991).
99977369 is an frugal number, since it uses more digits than its factorization.
99977369 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 476 (or 330 counting only the distinct ones).
The product of its digits is 5786802, while the sum is 59.
The square root of 99977369 is about 9998.8683859725.
The cubic root of 99977369 is about 464.1238661206.
The spelling of 99977369 in words is "ninety-nine million, nine hundred seventy-seven thousand, three hundred sixty-nine".