1997734111 has 2 divisors, whose sum is σ = 1997734112. Its totient is φ = 1997734110.

The previous prime is 1997734093. The next prime is 1997734129. The reversal of 1997734111 is 1114377991.

It is a balanced prime because it is at equal distance from previous prime (1997734093) and next prime (1997734129).

It is a cyclic number.

It is not a de Polignac number, because 1997734111 - 2²¹ = 1995636959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1997714111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998867055 + 998867056.

It is an arithmetic number, because the mean of its divisors is an integer number (998867056).

Almost surely, 2^1997734111 is an apocalyptic number.

1997734111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1997734111 is an equidigital number, since it uses as much as digits as its factorization.

1997734111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 43.

The square root of 1997734111 is about 44696.0189614243. The cubic root of 1997734111 is about 1259.4450632195.

The spelling of 1997734111 in words is "one billion, nine hundred ninety-seven million, seven hundred thirty-four thousand, one hundred eleven".