146826991 has 4 divisors (see below), whose sum is σ = 147485632. Its totient is φ = 146168352.

The previous prime is 146826973. The next prime is 146826997. The reversal of 146826991 is 199628641.

It is a happy number.

146826991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 146826991 - 2⁵ = 146826959 is a prime.

It is a super-2 number, since 2×146826991² = 43116330572228162, 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 (146826997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328986 + ... + 329431.

It is an arithmetic number, because the mean of its divisors is an integer number (36871408).

Almost surely, 2^146826991 is an apocalyptic number.

146826991 is a deficient number, since it is larger than the sum of its proper divisors (658641).

146826991 is an equidigital number, since it uses as much as digits as its factorization.

146826991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658640.

The product of its digits is 186624, while the sum is 46.

The square root of 146826991 is about 12117.2187815521. The cubic root of 146826991 is about 527.5560803790.

The spelling of 146826991 in words is "one hundred forty-six million, eight hundred twenty-six thousand, nine hundred ninety-one".