117721441 has 2 divisors, whose sum is σ = 117721442. Its totient is φ = 117721440.

The previous prime is 117721433. The next prime is 117721453. The reversal of 117721441 is 144127711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105267600 + 12453841 = 10260^2 + 3529^2 .

It is a cyclic number.

It is not a de Polignac number, because 117721441 - 2³ = 117721433 is a prime.

It is a super-2 number, since 2×117721441² = 27716675342232962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (117721841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58860720 + 58860721.

It is an arithmetic number, because the mean of its divisors is an integer number (58860721).

Almost surely, 2^117721441 is an apocalyptic number.

It is an amenable number.

117721441 is a deficient number, since it is larger than the sum of its proper divisors (1).

117721441 is an equidigital number, since it uses as much as digits as its factorization.

117721441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1568, while the sum is 28.

The square root of 117721441 is about 10849.9511980469. The cubic root of 117721441 is about 490.1005499609.

The spelling of 117721441 in words is "one hundred seventeen million, seven hundred twenty-one thousand, four hundred forty-one".