75863989 has 2 divisors, whose sum is σ = 75863990. Its totient is φ = 75863988.

The previous prime is 75863951. The next prime is 75863993. The reversal of 75863989 is 98936857.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69588964 + 6275025 = 8342^2 + 2505^2 .

It is a cyclic number.

It is not a de Polignac number, because 75863989 - 2⁹ = 75863477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75863999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37931994 + 37931995.

It is an arithmetic number, because the mean of its divisors is an integer number (37931995).

Almost surely, 2^75863989 is an apocalyptic number.

It is an amenable number.

75863989 is a deficient number, since it is larger than the sum of its proper divisors (1).

75863989 is an equidigital number, since it uses as much as digits as its factorization.

75863989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 55.

The square root of 75863989 is about 8709.9936280114. The cubic root of 75863989 is about 423.3295239425.

The spelling of 75863989 in words is "seventy-five million, eight hundred sixty-three thousand, nine hundred eighty-nine".