75042769 has 2 divisors, whose sum is σ = 75042770. Its totient is φ = 75042768.

The previous prime is 75042727. The next prime is 75042787. The reversal of 75042769 is 96724057.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55577025 + 19465744 = 7455^2 + 4412^2 .

It is an emirp because it is prime and its reverse (96724057) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75042769 is a prime.

It is a super-2 number, since 2×75042769² = 11262834358374722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (75042719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37521384 + 37521385.

It is an arithmetic number, because the mean of its divisors is an integer number (37521385).

Almost surely, 2^75042769 is an apocalyptic number.

It is an amenable number.

75042769 is a deficient number, since it is larger than the sum of its proper divisors (1).

75042769 is an equidigital number, since it uses as much as digits as its factorization.

75042769 is an evil number, because the sum of its binary digits is even.

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

The square root of 75042769 is about 8662.7229552837. The cubic root of 75042769 is about 421.7964791330.

The spelling of 75042769 in words is "seventy-five million, forty-two thousand, seven hundred sixty-nine".