145209933 has 12 divisors (see below), whose sum is σ = 228815808. Its totient is φ = 88005960.

The previous prime is 145209863. The next prime is 145210003. The reversal of 145209933 is 339902541.

It is a happy number.

145209933 is a `hidden beast` number, since 14 + 520 + 99 + 33 = 666.

It is an interprime number because it is at equal distance from previous prime (145209863) and next prime (145210003).

It is not a de Polignac number, because 145209933 - 2⁸ = 145209677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145209433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 733285 + ... + 733482.

It is an arithmetic number, because the mean of its divisors is an integer number (19067984).

Almost surely, 2^145209933 is an apocalyptic number.

It is an amenable number.

145209933 is a deficient number, since it is larger than the sum of its proper divisors (83605875).

145209933 is a wasteful number, since it uses less digits than its factorization.

145209933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1466784 (or 1466781 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 145209933 is about 12050.3084192895. The cubic root of 145209933 is about 525.6122055539.

The spelling of 145209933 in words is "one hundred forty-five million, two hundred nine thousand, nine hundred thirty-three".