997770099 has 8 divisors (see below), whose sum is σ = 1339171072. Its totient is φ = 660774600.

The previous prime is 997770091. The next prime is 997770113. The reversal of 997770099 is 990077799.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 997770099 - 2³ = 997770091 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (997770091) 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, 1100839 + ... + 1101744.

It is an arithmetic number, because the mean of its divisors is an integer number (167396384).

Almost surely, 2^997770099 is an apocalyptic number.

997770099 is a deficient number, since it is larger than the sum of its proper divisors (341400973).

997770099 is a wasteful number, since it uses less digits than its factorization.

997770099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202737.

The product of its (nonzero) digits is 2250423, while the sum is 57.

The square root of 997770099 is about 31587.4990937871. The cubic root of 997770099 is about 999.2561464858.

It can be divided in two parts, 9977700 and 99, that added together give a palindrome (9977799).

The spelling of 997770099 in words is "nine hundred ninety-seven million, seven hundred seventy thousand, ninety-nine".