1226201973 has 4 divisors (see below), whose sum is σ = 1634935968. Its totient is φ = 817467980.

The previous prime is 1226201957. The next prime is 1226201989. The reversal of 1226201973 is 3791026221.

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.

It is an interprime number because it is at equal distance from previous prime (1226201957) and next prime (1226201989).

It is a cyclic number.

It is not a de Polignac number, because 1226201973 - 2⁴ = 1226201957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226201903) 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, 204366993 + ... + 204366998.

It is an arithmetic number, because the mean of its divisors is an integer number (408733992).

Almost surely, 2^1226201973 is an apocalyptic number.

It is an amenable number.

1226201973 is a deficient number, since it is larger than the sum of its proper divisors (408733995).

1226201973 is an equidigital number, since it uses as much as digits as its factorization.

1226201973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408733994.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 1226201973 is about 35017.1668328550. The cubic root of 1226201973 is about 1070.3373242796.

The spelling of 1226201973 in words is "one billion, two hundred twenty-six million, two hundred one thousand, nine hundred seventy-three".