747272421491 has 2 divisors, whose sum is σ = 747272421492. Its totient is φ = 747272421490.

The previous prime is 747272421451. The next prime is 747272421523. The reversal of 747272421491 is 194124272747.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 747272421491 - 2¹⁴ = 747272405107 is a prime.

It is not a weakly prime, because it can be changed into another prime (747272421451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 373636210745 + 373636210746.

It is an arithmetic number, because the mean of its divisors is an integer number (373636210746).

Almost surely, 2^747272421491 is an apocalyptic number.

747272421491 is a deficient number, since it is larger than the sum of its proper divisors (1).

747272421491 is an equidigital number, since it uses as much as digits as its factorization.

747272421491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1580544, while the sum is 50.

The spelling of 747272421491 in words is "seven hundred forty-seven billion, two hundred seventy-two million, four hundred twenty-one thousand, four hundred ninety-one".