110721397 has 2 divisors, whose sum is σ = 110721398. Its totient is φ = 110721396.

The previous prime is 110721383. The next prime is 110721409. The reversal of 110721397 is 793127011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101727396 + 8994001 = 10086^2 + 2999^2 .

It is an emirp because it is prime and its reverse (793127011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-110721397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110721097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55360698 + 55360699.

It is an arithmetic number, because the mean of its divisors is an integer number (55360699).

Almost surely, 2^110721397 is an apocalyptic number.

It is an amenable number.

110721397 is a deficient number, since it is larger than the sum of its proper divisors (1).

110721397 is an equidigital number, since it uses as much as digits as its factorization.

110721397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2646, while the sum is 31.

The square root of 110721397 is about 10522.4235326278. The cubic root of 110721397 is about 480.1871333424.

The spelling of 110721397 in words is "one hundred ten million, seven hundred twenty-one thousand, three hundred ninety-seven".