75724169 has 2 divisors, whose sum is σ = 75724170. Its totient is φ = 75724168.

The previous prime is 75724109. The next prime is 75724183. The reversal of 75724169 is 96142757.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70341769 + 5382400 = 8387^2 + 2320^2 .

It is a cyclic number.

It is not a de Polignac number, because 75724169 - 2⁸ = 75723913 is a prime.

It is a super-2 number, since 2×75724169² = 11468299541481122, which contains 22 as substring.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (75724109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37862084 + 37862085.

It is an arithmetic number, because the mean of its divisors is an integer number (37862085).

Almost surely, 2^75724169 is an apocalyptic number.

It is an amenable number.

75724169 is a deficient number, since it is larger than the sum of its proper divisors (1).

75724169 is an equidigital number, since it uses as much as digits as its factorization.

75724169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 41.

The square root of 75724169 is about 8701.9635140582. The cubic root of 75724169 is about 423.0692936052.

The spelling of 75724169 in words is "seventy-five million, seven hundred twenty-four thousand, one hundred sixty-nine".