1227997433 has 12 divisors (see below), whose sum is σ = 1336650300. Its totient is φ = 1127632896.

The previous prime is 1227997427. The next prime is 1227997487. The reversal of 1227997433 is 3347997221.

It can be written as a sum of positive squares in 6 ways, for example, as 67436944 + 1160560489 = 8212^2 + 34067^2 .

It is not a de Polignac number, because 1227997433 - 2⁶ = 1227997369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1227997633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13793 + ... + 51441.

It is an arithmetic number, because the mean of its divisors is an integer number (111387525).

Almost surely, 2^1227997433 is an apocalyptic number.

1227997433 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1227997433 is a deficient number, since it is larger than the sum of its proper divisors (108652867).

1227997433 is a wasteful number, since it uses less digits than its factorization.

1227997433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37868 (or 37855 counting only the distinct ones).

The product of its digits is 571536, while the sum is 47.

The square root of 1227997433 is about 35042.7943092442. The cubic root of 1227997433 is about 1070.8594815008.

The spelling of 1227997433 in words is "one billion, two hundred twenty-seven million, nine hundred ninety-seven thousand, four hundred thirty-three".