997725011 has 4 divisors (see below), whose sum is σ = 997836312. Its totient is φ = 997613712.

The previous prime is 997725007. The next prime is 997725013. The reversal of 997725011 is 110527799.

It is a happy number.

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 997725011 - 2² = 997725007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 997725011.

It is not an unprimeable number, because it can be changed into a prime (997725013) 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, 40901 + ... + 60566.

It is an arithmetic number, because the mean of its divisors is an integer number (249459078).

Almost surely, 2^997725011 is an apocalyptic number.

997725011 is a deficient number, since it is larger than the sum of its proper divisors (111301).

997725011 is a wasteful number, since it uses less digits than its factorization.

997725011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111300.

The product of its (nonzero) digits is 39690, while the sum is 41.

The square root of 997725011 is about 31586.7853856640. The cubic root of 997725011 is about 999.2410945415.

The spelling of 997725011 in words is "nine hundred ninety-seven million, seven hundred twenty-five thousand, eleven".