997250685 has 16 divisors (see below), whose sum is σ = 1689460416. Its totient is φ = 500580608.

The previous prime is 997250671. The next prime is 997250689. The reversal of 997250685 is 586052799.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 997250685 - 2⁷ = 997250557 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997250689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1955139 + ... + 1955648.

It is an arithmetic number, because the mean of its divisors is an integer number (105591276).

Almost surely, 2^997250685 is an apocalyptic number.

It is an amenable number.

997250685 is a deficient number, since it is larger than the sum of its proper divisors (692209731).

997250685 is a wasteful number, since it uses less digits than its factorization.

997250685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3910812.

The product of its (nonzero) digits is 1360800, while the sum is 51.

The square root of 997250685 is about 31579.2761949985. The cubic root of 997250685 is about 999.0827205223.

The spelling of 997250685 in words is "nine hundred ninety-seven million, two hundred fifty thousand, six hundred eighty-five".