111967553 has 2 divisors, whose sum is σ = 111967554. Its totient is φ = 111967552.

The previous prime is 111967547. The next prime is 111967561. The reversal of 111967553 is 355769111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97160449 + 14807104 = 9857^2 + 3848^2 .

It is an emirp because it is prime and its reverse (355769111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111967553 - 2¹² = 111963457 is a prime.

It is not a weakly prime, because it can be changed into another prime (111967573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55983776 + 55983777.

It is an arithmetic number, because the mean of its divisors is an integer number (55983777).

Almost surely, 2^111967553 is an apocalyptic number.

It is an amenable number.

111967553 is a deficient number, since it is larger than the sum of its proper divisors (1).

111967553 is an equidigital number, since it uses as much as digits as its factorization.

111967553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28350, while the sum is 38.

The square root of 111967553 is about 10581.4721565574. The cubic root of 111967553 is about 481.9818995975.

The spelling of 111967553 in words is "one hundred eleven million, nine hundred sixty-seven thousand, five hundred fifty-three".