75627989 has 2 divisors, whose sum is σ = 75627990. Its totient is φ = 75627988.

The previous prime is 75627977. The next prime is 75627991. The reversal of 75627989 is 98972657.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75603025 + 24964 = 8695^2 + 158^2 .

It is a cyclic number.

It is not a de Polignac number, because 75627989 - 2²⁰ = 74579413 is a prime.

Together with 75627991, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75627989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75627919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37813994 + 37813995.

It is an arithmetic number, because the mean of its divisors is an integer number (37813995).

Almost surely, 2^75627989 is an apocalyptic number.

It is an amenable number.

75627989 is a deficient number, since it is larger than the sum of its proper divisors (1).

75627989 is an equidigital number, since it uses as much as digits as its factorization.

75627989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 53.

The square root of 75627989 is about 8696.4354191818. The cubic root of 75627989 is about 422.8900991904.

It can be divided in two parts, 7562 and 7989, that added together give a palindrome (15551).

The spelling of 75627989 in words is "seventy-five million, six hundred twenty-seven thousand, nine hundred eighty-nine".