647951467 has 4 divisors (see below), whose sum is σ = 657077616. Its totient is φ = 638825320.

The previous prime is 647951459. The next prime is 647951503. The reversal of 647951467 is 764159746.

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

It is a cyclic number.

It is not a de Polignac number, because 647951467 - 2³ = 647951459 is a prime.

It is a super-2 number, since 2×647951467² = 839682207174904178, 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 647951467.

It is not an unprimeable number, because it can be changed into a prime (647951407) 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, 4562968 + ... + 4563109.

It is an arithmetic number, because the mean of its divisors is an integer number (164269404).

Almost surely, 2^647951467 is an apocalyptic number.

647951467 is a deficient number, since it is larger than the sum of its proper divisors (9126149).

647951467 is an equidigital number, since it uses as much as digits as its factorization.

647951467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9126148.

The product of its digits is 1270080, while the sum is 49.

The square root of 647951467 is about 25454.8908267154. The cubic root of 647951467 is about 865.3281377258.

The spelling of 647951467 in words is "six hundred forty-seven million, nine hundred fifty-one thousand, four hundred sixty-seven".