1491380569 has 8 divisors (see below), whose sum is σ = 1720983680. Its totient is φ = 1265914656.

The previous prime is 1491380563. The next prime is 1491380609. The reversal of 1491380569 is 9650831941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1491380569 - 2⁹ = 1491380057 is a prime.

It is a super-2 number, since 2×1491380569² = 4448432003181527522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1491380563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1033524 + ... + 1034965.

It is an arithmetic number, because the mean of its divisors is an integer number (215122960).

Almost surely, 2^1491380569 is an apocalyptic number.

It is an amenable number.

1491380569 is a deficient number, since it is larger than the sum of its proper divisors (229603111).

1491380569 is a wasteful number, since it uses less digits than its factorization.

1491380569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068599.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 1491380569 is about 38618.3967688976. The cubic root of 1491380569 is about 1142.5174103040.

The spelling of 1491380569 in words is "one billion, four hundred ninety-one million, three hundred eighty thousand, five hundred sixty-nine".