75774989 has 2 divisors, whose sum is σ = 75774990. Its totient is φ = 75774988.

The previous prime is 75774977. The next prime is 75775003. The reversal of 75774989 is 98947757.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68392900 + 7382089 = 8270^2 + 2717^2 .

It is an emirp because it is prime and its reverse (98947757) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75774989 - 2⁴ = 75774973 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75744989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37887494 + 37887495.

It is an arithmetic number, because the mean of its divisors is an integer number (37887495).

Almost surely, 2^75774989 is an apocalyptic number.

It is an amenable number.

75774989 is a deficient number, since it is larger than the sum of its proper divisors (1).

75774989 is an equidigital number, since it uses as much as digits as its factorization.

75774989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4445280, while the sum is 56.

The square root of 75774989 is about 8704.8830549296. The cubic root of 75774989 is about 423.1639158541.

The spelling of 75774989 in words is "seventy-five million, seven hundred seventy-four thousand, nine hundred eighty-nine".