146797181 has 8 divisors (see below), whose sum is σ = 148558200. Its totient is φ = 145041408.

The previous prime is 146797169. The next prime is 146797187. The reversal of 146797181 is 181797641.

It can be written as a sum of positive squares in 4 ways, for example, as 40005625 + 106791556 = 6325^2 + 10334^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 146797181 - 2⁶ = 146797117 is a prime.

It is a super-2 number, since 2×146797181² = 43098824699093522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146797187) 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 in 7 ways as a sum of consecutive naturals, for example, 93995 + ... + 95543.

It is an arithmetic number, because the mean of its divisors is an integer number (18569775).

Almost surely, 2^146797181 is an apocalyptic number.

It is an amenable number.

146797181 is a deficient number, since it is larger than the sum of its proper divisors (1761019).

146797181 is an equidigital number, since it uses as much as digits as its factorization.

146797181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2623.

The product of its digits is 84672, while the sum is 44.

The square root of 146797181 is about 12115.9886513648. The cubic root of 146797181 is about 527.5203750656.

The spelling of 146797181 in words is "one hundred forty-six million, seven hundred ninety-seven thousand, one hundred eighty-one".