1904368481 has 4 divisors (see below), whose sum is σ = 1907475732. Its totient is φ = 1901261232.

The previous prime is 1904368469. The next prime is 1904368483. The reversal of 1904368481 is 1848634091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1848634091 = 11833 ⋅156227.

It can be written as a sum of positive squares in 2 ways, for example, as 97693456 + 1806675025 = 9884^2 + 42505^2 .

It is a cyclic number.

It is not a de Polignac number, because 1904368481 - 2¹⁴ = 1904352097 is a prime.

It is a super-2 number, since 2×1904368481² = 7253238622852494722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1904368483) 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, 1552706 + ... + 1553931.

It is an arithmetic number, because the mean of its divisors is an integer number (476868933).

Almost surely, 2^1904368481 is an apocalyptic number.

It is an amenable number.

1904368481 is a deficient number, since it is larger than the sum of its proper divisors (3107251).

1904368481 is an equidigital number, since it uses as much as digits as its factorization.

1904368481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3107250.

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 1904368481 is about 43639.0705790121. The cubic root of 1904368481 is about 1239.5108374513.

The spelling of 1904368481 in words is "one billion, nine hundred four million, three hundred sixty-eight thousand, four hundred eighty-one".