1227945973 has 8 divisors (see below), whose sum is σ = 1262041560. Its totient is φ = 1193898240.

The previous prime is 1227945967. The next prime is 1227945997. The reversal of 1227945973 is 3795497221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 408727089 + 819218884 = 20217^2 + 28622^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1227945973 - 2⁹ = 1227945461 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 (1227948973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43593 + ... + 66001.

It is an arithmetic number, because the mean of its divisors is an integer number (157755195).

Almost surely, 2^1227945973 is an apocalyptic number.

It is an amenable number.

1227945973 is a deficient number, since it is larger than the sum of its proper divisors (34095587).

1227945973 is a wasteful number, since it uses less digits than its factorization.

1227945973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23927.

The product of its digits is 952560, while the sum is 49.

The square root of 1227945973 is about 35042.0600564522. The cubic root of 1227945973 is about 1070.8445229466.

The spelling of 1227945973 in words is "one billion, two hundred twenty-seven million, nine hundred forty-five thousand, nine hundred seventy-three".