247640074336139 has 4 divisors (see below), whose sum is σ = 247644317058840. Its totient is φ = 247635831613440.

The previous prime is 247640074336133. The next prime is 247640074336159. The reversal of 247640074336139 is 931633470046742.

It is a happy number.

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 247640074336139 - 2¹² = 247640074332043 is a prime.

It is a super-2 number, since 2×247640074336139² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247640074336133) 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, 2121273797 + ... + 2121390534.

It is an arithmetic number, because the mean of its divisors is an integer number (61911079264710).

Almost surely, 2^{247640074336139} is an apocalyptic number.

247640074336139 is a deficient number, since it is larger than the sum of its proper divisors (4242722701).

247640074336139 is an equidigital number, since it uses as much as digits as its factorization.

247640074336139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4242722700.

The product of its (nonzero) digits is 54867456, while the sum is 59.

The spelling of 247640074336139 in words is "two hundred forty-seven trillion, six hundred forty billion, seventy-four million, three hundred thirty-six thousand, one hundred thirty-nine".