1901479447 has 12 divisors (see below), whose sum is σ = 2213148576. Its totient is φ = 1628938080.

The previous prime is 1901479441. The next prime is 1901479477. The reversal of 1901479447 is 7449741091.

It is a happy number.

It is not a de Polignac number, because 1901479447 - 2³ = 1901479439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1901479397 and 1901479406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1901479441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87922 + ... + 107392.

It is an arithmetic number, because the mean of its divisors is an integer number (184429048).

Almost surely, 2^1901479447 is an apocalyptic number.

1901479447 is a deficient number, since it is larger than the sum of its proper divisors (311669129).

1901479447 is a wasteful number, since it uses less digits than its factorization.

1901479447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21478 (or 21471 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 1901479447 is about 43605.9565541223. The cubic root of 1901479447 is about 1238.8837176878.

The spelling of 1901479447 in words is "one billion, nine hundred one million, four hundred seventy-nine thousand, four hundred forty-seven".