647074212431 has 4 divisors (see below), whose sum is σ = 648837357792. Its totient is φ = 645311067072.

The previous prime is 647074212409. The next prime is 647074212493. The reversal of 647074212431 is 134212470746.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134212470746 = 2 ⋅67106235373.

It is a cyclic number.

It is not a de Polignac number, because 647074212431 - 2³⁰ = 646000470607 is a prime.

It is a super-2 number, since 2×647074212431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647074212331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 881572130 + ... + 881572863.

It is an arithmetic number, because the mean of its divisors is an integer number (162209339448).

Almost surely, 2^647074212431 is an apocalyptic number.

647074212431 is a deficient number, since it is larger than the sum of its proper divisors (1763145361).

647074212431 is a wasteful number, since it uses less digits than its factorization.

647074212431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1763145360.

The product of its (nonzero) digits is 225792, while the sum is 41.

The spelling of 647074212431 in words is "six hundred forty-seven billion, seventy-four million, two hundred twelve thousand, four hundred thirty-one".