90625709 has 2 divisors, whose sum is σ = 90625710. Its totient is φ = 90625708.

The previous prime is 90625699. The next prime is 90625739. The reversal of 90625709 is 90752609.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89775625 + 850084 = 9475^2 + 922^2 .

It is an emirp because it is prime and its reverse (90752609) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90625709 - 2¹² = 90621613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90625739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45312854 + 45312855.

It is an arithmetic number, because the mean of its divisors is an integer number (45312855).

Almost surely, 2^90625709 is an apocalyptic number.

It is an amenable number.

90625709 is a deficient number, since it is larger than the sum of its proper divisors (1).

90625709 is an equidigital number, since it uses as much as digits as its factorization.

90625709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 90625709 is about 9519.7536207614. The cubic root of 90625709 is about 449.1766161497.

The spelling of 90625709 in words is "ninety million, six hundred twenty-five thousand, seven hundred nine".