1954447049 has 4 divisors (see below), whose sum is σ = 2017493760. Its totient is φ = 1891400340.

The previous prime is 1954447021. The next prime is 1954447067. The reversal of 1954447049 is 9407444591.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9407444591 = 1523 ⋅6176917.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1954447049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1954446994 and 1954447012.

It is not an unprimeable number, because it can be changed into a prime (1954447009) 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, 31523309 + ... + 31523370.

It is an arithmetic number, because the mean of its divisors is an integer number (504373440).

Almost surely, 2^1954447049 is an apocalyptic number.

It is an amenable number.

1954447049 is a deficient number, since it is larger than the sum of its proper divisors (63046711).

1954447049 is an equidigital number, since it uses as much as digits as its factorization.

1954447049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63046710.

The product of its (nonzero) digits is 725760, while the sum is 47.

The square root of 1954447049 is about 44209.1285709185. The cubic root of 1954447049 is about 1250.2819735080.

The spelling of 1954447049 in words is "one billion, nine hundred fifty-four million, four hundred forty-seven thousand, forty-nine".