75437149 has 4 divisors (see below), whose sum is σ = 78038460. Its totient is φ = 72835840.

The previous prime is 75437137. The next prime is 75437183. The reversal of 75437149 is 94173457.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94173457 = 7 ⋅13453351.

It can be written as a sum of positive squares in 2 ways, for example, as 37429924 + 38007225 = 6118^2 + 6165^2 .

It is a cyclic number.

It is not a de Polignac number, because 75437149 - 2¹⁹ = 74912861 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 (75437129) 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, 1300612 + ... + 1300669.

It is an arithmetic number, because the mean of its divisors is an integer number (19509615).

Almost surely, 2^75437149 is an apocalyptic number.

It is an amenable number.

75437149 is a deficient number, since it is larger than the sum of its proper divisors (2601311).

75437149 is a wasteful number, since it uses less digits than its factorization.

75437149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2601310.

The product of its digits is 105840, while the sum is 40.

The square root of 75437149 is about 8685.4561768510. The cubic root of 75437149 is about 422.5340919936.

The spelling of 75437149 in words is "seventy-five million, four hundred thirty-seven thousand, one hundred forty-nine".