11233311997 has 2 divisors, whose sum is σ = 11233311998. Its totient is φ = 11233311996.

The previous prime is 11233311983. The next prime is 11233312001. The reversal of 11233311997 is 79911333211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5670240601 + 5563071396 = 75301^2 + 74586^2 .

It is a cyclic number.

It is not a de Polignac number, because 11233311997 - 2¹⁵ = 11233279229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11233311967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5616655998 + 5616655999.

It is an arithmetic number, because the mean of its divisors is an integer number (5616655999).

Almost surely, 2^11233311997 is an apocalyptic number.

It is an amenable number.

11233311997 is a deficient number, since it is larger than the sum of its proper divisors (1).

11233311997 is an equidigital number, since it uses as much as digits as its factorization.

11233311997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 40.

The spelling of 11233311997 in words is "eleven billion, two hundred thirty-three million, three hundred eleven thousand, nine hundred ninety-seven".