146509399 has 8 divisors (see below), whose sum is σ = 154586880. Its totient is φ = 138468600.

The previous prime is 146509367. The next prime is 146509427. The reversal of 146509399 is 993905641.

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 146509399 - 2⁵ = 146509367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146509309) 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, 757 + ... + 17134.

It is an arithmetic number, because the mean of its divisors is an integer number (19323360).

Almost surely, 2^146509399 is an apocalyptic number.

146509399 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

146509399 is a deficient number, since it is larger than the sum of its proper divisors (8077481).

146509399 is a wasteful number, since it uses less digits than its factorization.

146509399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18341.

The product of its (nonzero) digits is 262440, while the sum is 46.

The square root of 146509399 is about 12104.1066997941. The cubic root of 146509399 is about 527.1754316106.

It can be divided in two parts, 146 and 509399, that added together give a triangular number (509545 = T₁₀₀₉).

The spelling of 146509399 in words is "one hundred forty-six million, five hundred nine thousand, three hundred ninety-nine".