1472409991 has 4 divisors (see below), whose sum is σ = 1585672312. Its totient is φ = 1359147672.

The previous prime is 1472409977. The next prime is 1472410003. The reversal of 1472409991 is 1999042741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1999042741 = 881 ⋅2269061.

It is a cyclic number.

It is not a de Polignac number, because 1472409991 - 2¹⁹ = 1471885703 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 (1472409901) 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, 56631141 + ... + 56631166.

It is an arithmetic number, because the mean of its divisors is an integer number (396418078).

Almost surely, 2^1472409991 is an apocalyptic number.

1472409991 is a deficient number, since it is larger than the sum of its proper divisors (113262321).

1472409991 is a wasteful number, since it uses less digits than its factorization.

1472409991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113262320.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 1472409991 is about 38371.9948790782. The cubic root of 1472409991 is about 1137.6523944437.

The spelling of 1472409991 in words is "one billion, four hundred seventy-two million, four hundred nine thousand, nine hundred ninety-one".