997720050 has 24 divisors (see below), whose sum is σ = 2474346096. Its totient is φ = 266058640.

The previous prime is 997720049. The next prime is 997720051. The reversal of 997720050 is 50027799.

It is an interprime number because it is at equal distance from previous prime (997720049) and next prime (997720051).

It is a junction number, because it is equal to n+sod(n) for n = 997719990 and 997720008.

It is not an unprimeable number, because it can be changed into a prime (997720051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3325584 + ... + 3325883.

It is an arithmetic number, because the mean of its divisors is an integer number (103097754).

Almost surely, 2^997720050 is an apocalyptic number.

997720050 is an abundant number, since it is smaller than the sum of its proper divisors (1476626046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

997720050 is a wasteful number, since it uses less digits than its factorization.

997720050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6651482 (or 6651477 counting only the distinct ones).

The product of its (nonzero) digits is 39690, while the sum is 39.

The square root of 997720050 is about 31586.7068558911. The cubic root of 997720050 is about 999.2394383593.

The spelling of 997720050 in words is "nine hundred ninety-seven million, seven hundred twenty thousand, fifty".