97786009 has 4 divisors (see below), whose sum is σ = 97856820. Its totient is φ = 97715200.

The previous prime is 97785973. The next prime is 97786021. The reversal of 97786009 is 90068779.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25280784 + 72505225 = 5028^2 + 8515^2 .

It is a cyclic number.

It is not a de Polignac number, because 97786009 - 2⁷ = 97785881 is a prime.

It is a super-2 number, since 2×97786009² = 19124207112296162, which contains 22 as substring.

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 97786009.

It is not an unprimeable number, because it can be changed into a prime (97786309) 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, 33292 + ... + 36109.

It is an arithmetic number, because the mean of its divisors is an integer number (24464205).

Almost surely, 2^97786009 is an apocalyptic number.

It is an amenable number.

97786009 is a deficient number, since it is larger than the sum of its proper divisors (70811).

97786009 is a wasteful number, since it uses less digits than its factorization.

97786009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70810.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 97786009 is about 9888.6808523685. The cubic root of 97786009 is about 460.7078091901.

The spelling of 97786009 in words is "ninety-seven million, seven hundred eighty-six thousand, nine".