75243659987 has 2 divisors, whose sum is σ = 75243659988. Its totient is φ = 75243659986.

The previous prime is 75243659969. The next prime is 75243660073. The reversal of 75243659987 is 78995634257.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 75243659987 - 2¹² = 75243655891 is a prime.

It is not a weakly prime, because it can be changed into another prime (75243659917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37621829993 + 37621829994.

It is an arithmetic number, because the mean of its divisors is an integer number (37621829994).

Almost surely, 2^75243659987 is an apocalyptic number.

75243659987 is a deficient number, since it is larger than the sum of its proper divisors (1).

75243659987 is an equidigital number, since it uses as much as digits as its factorization.

75243659987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 114307200, while the sum is 65.

The spelling of 75243659987 in words is "seventy-five billion, two hundred forty-three million, six hundred fifty-nine thousand, nine hundred eighty-seven".