75549973 has 2 divisors, whose sum is σ = 75549974. Its totient is φ = 75549972.

The previous prime is 75549961. The next prime is 75549977. The reversal of 75549973 is 37994557.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64112049 + 11437924 = 8007^2 + 3382^2 .

It is an emirp because it is prime and its reverse (37994557) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75549973 - 2¹⁷ = 75418901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75549977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37774986 + 37774987.

It is an arithmetic number, because the mean of its divisors is an integer number (37774987).

Almost surely, 2^75549973 is an apocalyptic number.

It is an amenable number.

75549973 is a deficient number, since it is larger than the sum of its proper divisors (1).

75549973 is an equidigital number, since it uses as much as digits as its factorization.

75549973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1190700, while the sum is 49.

The square root of 75549973 is about 8691.9487458222. The cubic root of 75549973 is about 422.7446347683.

The spelling of 75549973 in words is "seventy-five million, five hundred forty-nine thousand, nine hundred seventy-three".