146989821 has 16 divisors (see below), whose sum is σ = 218354688. Its totient is φ = 87188400.

The previous prime is 146989811. The next prime is 146989831. The reversal of 146989821 is 128989641.

It is an interprime number because it is at equal distance from previous prime (146989811) and next prime (146989831).

It is not a de Polignac number, because 146989821 - 2⁹ = 146989309 is a prime.

It is a super-2 number, since 2×146989821² = 43212014955224082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146989811) 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, 45835 + ... + 48936.

It is an arithmetic number, because the mean of its divisors is an integer number (13647168).

Almost surely, 2^146989821 is an apocalyptic number.

146989821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

146989821 is a deficient number, since it is larger than the sum of its proper divisors (71364867).

146989821 is a wasteful number, since it uses less digits than its factorization.

146989821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94832.

The product of its digits is 248832, while the sum is 48.

The square root of 146989821 is about 12123.9358708301. The cubic root of 146989821 is about 527.7510268727.

The spelling of 146989821 in words is "one hundred forty-six million, nine hundred eighty-nine thousand, eight hundred twenty-one".