1144471906 has 4 divisors (see below), whose sum is σ = 1716707862. Its totient is φ = 572235952.

The previous prime is 1144471891. The next prime is 1144471907. The reversal of 1144471906 is 6091744411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6091744411 = 32401 ⋅188011.

It can be written as a sum of positive squares in only one way, i.e., 736633881 + 407838025 = 27141^2 + 20195^2 .

It is not an unprimeable number, because it can be changed into a prime (1144471907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 286117975 + ... + 286117978.

Almost surely, 2^1144471906 is an apocalyptic number.

1144471906 is a deficient number, since it is larger than the sum of its proper divisors (572235956).

1144471906 is an equidigital number, since it uses as much as digits as its factorization.

1144471906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572235955.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 1144471906 is about 33830.0444279933. The cubic root of 1144471906 is about 1046.0080947524.

The spelling of 1144471906 in words is "one billion, one hundred forty-four million, four hundred seventy-one thousand, nine hundred six".