1247394623489 has 32 divisors (see below), whose sum is σ = 1473946274304. Its totient is φ = 1033547074560.

The previous prime is 1247394623441. The next prime is 1247394623507. The reversal of 1247394623489 is 9843264937421.

It is a happy number.

It is not a de Polignac number, because 1247394623489 - 2¹⁶ = 1247394557953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1247394623429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40892327 + ... + 40922819.

It is an arithmetic number, because the mean of its divisors is an integer number (46060821072).

Almost surely, 2^{1247394623489} is an apocalyptic number.

It is an amenable number.

1247394623489 is a deficient number, since it is larger than the sum of its proper divisors (226551650815).

1247394623489 is a wasteful number, since it uses less digits than its factorization.

1247394623489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32177.

The product of its digits is 62705664, while the sum is 62.

The spelling of 1247394623489 in words is "one trillion, two hundred forty-seven billion, three hundred ninety-four million, six hundred twenty-three thousand, four hundred eighty-nine".