1167720401 has 2 divisors, whose sum is σ = 1167720402. Its totient is φ = 1167720400.

The previous prime is 1167720371. The next prime is 1167720413. The reversal of 1167720401 is 1040277611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 994771600 + 172948801 = 31540^2 + 13151^2 .

It is an emirp because it is prime and its reverse (1040277611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1167720401 - 2²² = 1163526097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1167729401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583860200 + 583860201.

It is an arithmetic number, because the mean of its divisors is an integer number (583860201).

Almost surely, 2^1167720401 is an apocalyptic number.

It is an amenable number.

1167720401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1167720401 is an equidigital number, since it uses as much as digits as its factorization.

1167720401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 1167720401 is about 34171.9241629733. The cubic root of 1167720401 is about 1053.0434454258.

The spelling of 1167720401 in words is "one billion, one hundred sixty-seven million, seven hundred twenty thousand, four hundred one".