247901422609 has 9 divisors (see below), whose sum is σ = 253822566153. Its totient is φ = 242115361572.

The previous prime is 247901422577. The next prime is 247901422673. The reversal of 247901422609 is 906224109742.

The square root of 247901422609 is 497897.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 247901422609 - 2⁵ = 247901422577 is a prime.

It is a super-2 number, since 2×247901422609² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247901422679) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 21403782 + ... + 21415360.

Almost surely, 2^247901422609 is an apocalyptic number.

247901422609 is the 497897-th square number.

247901422609 is the 248949-th centered octagonal number.

It is an amenable number.

247901422609 is a deficient number, since it is larger than the sum of its proper divisors (5921143544).

247901422609 is an frugal number, since it uses more digits than its factorization.

247901422609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23244 (or 11622 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 247901422609 in words is "two hundred forty-seven billion, nine hundred one million, four hundred twenty-two thousand, six hundred nine".