697081647986 has 4 divisors (see below), whose sum is σ = 1045622471982. Its totient is φ = 348540823992.

The previous prime is 697081647973. The next prime is 697081647989. The reversal of 697081647986 is 689746180796.

697081647986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 465763935961 + 231317712025 = 682469^2 + 480955^2 .

It is not an unprimeable number, because it can be changed into a prime (697081647989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174270411995 + ... + 174270411998.

Almost surely, 2^697081647986 is an apocalyptic number.

697081647986 is a deficient number, since it is larger than the sum of its proper divisors (348540823996).

697081647986 is a wasteful number, since it uses less digits than its factorization.

697081647986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348540823995.

The product of its (nonzero) digits is 219469824, while the sum is 71.

The spelling of 697081647986 in words is "six hundred ninety-seven billion, eighty-one million, six hundred forty-seven thousand, nine hundred eighty-six".