146188729 has 8 divisors (see below), whose sum is σ = 156210120. Its totient is φ = 136325376.

The previous prime is 146188711. The next prime is 146188733. The reversal of 146188729 is 927881641.

It can be written as a sum of positive squares in 4 ways, for example, as 44582329 + 101606400 = 6677^2 + 10080^2 .

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 146188729 - 2¹¹ = 146186681 is a prime.

It is a super-2 number, since 2×146188729² = 42742288973270882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146188709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37594 + ... + 41299.

It is an arithmetic number, because the mean of its divisors is an integer number (19526265).

Almost surely, 2^146188729 is an apocalyptic number.

It is an amenable number.

146188729 is a deficient number, since it is larger than the sum of its proper divisors (10021391).

146188729 is a wasteful number, since it uses less digits than its factorization.

146188729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79019.

The product of its digits is 193536, while the sum is 46.

The square root of 146188729 is about 12090.8531129941. The cubic root of 146188729 is about 526.7905351884.

The spelling of 146188729 in words is "one hundred forty-six million, one hundred eighty-eight thousand, seven hundred twenty-nine".