73149975 has 36 divisors (see below), whose sum is σ = 132632136. Its totient is φ = 38533440.

The previous prime is 73149953. The next prime is 73150037. The reversal of 73149975 is 57994137.

It is not a de Polignac number, because 73149975 - 2⁹ = 73149463 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 73149975.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16717 + ... + 20633.

It is an arithmetic number, because the mean of its divisors is an integer number (3684226).

Almost surely, 2^73149975 is an apocalyptic number.

73149975 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

73149975 is a deficient number, since it is larger than the sum of its proper divisors (59482161).

73149975 is a wasteful number, since it uses less digits than its factorization.

73149975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4016 (or 4008 counting only the distinct ones).

The product of its digits is 238140, while the sum is 45.

The square root of 73149975 is about 8552.7758651797. The cubic root of 73149975 is about 418.2199322610.

The spelling of 73149975 in words is "seventy-three million, one hundred forty-nine thousand, nine hundred seventy-five".