1491467479 has 4 divisors (see below), whose sum is σ = 1491727984. Its totient is φ = 1491206976.

The previous prime is 1491467473. The next prime is 1491467519. The reversal of 1491467479 is 9747641941.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1491467479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491467473) 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, 121467 + ... + 133180.

It is an arithmetic number, because the mean of its divisors is an integer number (372931996).

Almost surely, 2^1491467479 is an apocalyptic number.

1491467479 is a deficient number, since it is larger than the sum of its proper divisors (260505).

1491467479 is an equidigital number, since it uses as much as digits as its factorization.

1491467479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260504.

The product of its digits is 1524096, while the sum is 52.

The square root of 1491467479 is about 38619.5219934167. The cubic root of 1491467479 is about 1142.5396032219.

The spelling of 1491467479 in words is "one billion, four hundred ninety-one million, four hundred sixty-seven thousand, four hundred seventy-nine".