247986497 has 16 divisors (see below), whose sum is σ = 290734272. Its totient is φ = 209003520.

The previous prime is 247986467. The next prime is 247986521. The reversal of 247986497 is 794689742.

It is not a de Polignac number, because 247986497 - 2⁶ = 247986433 is a prime.

It is a super-2 number, since 2×247986497² = 122994605388662018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247986467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2633 + ... + 22425.

It is an arithmetic number, because the mean of its divisors is an integer number (18170892).

Almost surely, 2^247986497 is an apocalyptic number.

It is an amenable number.

247986497 is a deficient number, since it is larger than the sum of its proper divisors (42747775).

247986497 is a wasteful number, since it uses less digits than its factorization.

247986497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19888.

The product of its digits is 6096384, while the sum is 56.

The square root of 247986497 is about 15747.5870215090. The cubic root of 247986497 is about 628.2647275662.

The spelling of 247986497 in words is "two hundred forty-seven million, nine hundred eighty-six thousand, four hundred ninety-seven".