1491467473 has 2 divisors, whose sum is σ = 1491467474. Its totient is φ = 1491467472.

The previous prime is 1491467437. The next prime is 1491467519. The reversal of 1491467473 is 3747641941.

Together with previous prime (1491467437) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (1491467519) can be obtained adding 1491467473 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1005397264 + 486070209 = 31708^2 + 22047^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1491467473 is a prime.

It is not a weakly prime, because it can be changed into another prime (1491465473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745733736 + 745733737.

It is an arithmetic number, because the mean of its divisors is an integer number (745733737).

Almost surely, 2^1491467473 is an apocalyptic number.

It is an amenable number.

1491467473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1491467473 is an equidigital number, since it uses as much as digits as its factorization.

1491467473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 46.

The square root of 1491467473 is about 38619.5219157358. The cubic root of 1491467473 is about 1142.5396016898.

The spelling of 1491467473 in words is "one billion, four hundred ninety-one million, four hundred sixty-seven thousand, four hundred seventy-three".