146394891 has 16 divisors (see below), whose sum is σ = 217837600. Its totient is φ = 97166304.

The previous prime is 146394883. The next prime is 146394893. The reversal of 146394891 is 198493641.

146394891 is a `hidden beast` number, since 1 + 4 + 639 + 4 + 8 + 9 + 1 = 666.

It is not a de Polignac number, because 146394891 - 2³ = 146394883 is a prime.

It is a super-2 number, since 2×146394891² = 42862928221803762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146394893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5656 + ... + 18021.

It is an arithmetic number, because the mean of its divisors is an integer number (13614850).

Almost surely, 2^146394891 is an apocalyptic number.

146394891 is a deficient number, since it is larger than the sum of its proper divisors (71442709).

146394891 is a wasteful number, since it uses less digits than its factorization.

146394891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23915 (or 23909 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 146394891 is about 12099.3756450488. The cubic root of 146394891 is about 527.0380535349.

The spelling of 146394891 in words is "one hundred forty-six million, three hundred ninety-four thousand, eight hundred ninety-one".