90687739 has 2 divisors, whose sum is σ = 90687740. Its totient is φ = 90687738.

The previous prime is 90687733. The next prime is 90687749. The reversal of 90687739 is 93778609.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90687739 - 2⁹ = 90687227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90687692 and 90687701.

It is not a weakly prime, because it can be changed into another prime (90687733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45343869 + 45343870.

It is an arithmetic number, because the mean of its divisors is an integer number (45343870).

Almost surely, 2^90687739 is an apocalyptic number.

90687739 is a deficient number, since it is larger than the sum of its proper divisors (1).

90687739 is an equidigital number, since it uses as much as digits as its factorization.

90687739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 90687739 is about 9523.0110259308. The cubic root of 90687739 is about 449.2790744597.

It can be divided in two parts, 9068 and 7739, that added together give a 5-th power (16807 = 7⁵).

The spelling of 90687739 in words is "ninety million, six hundred eighty-seven thousand, seven hundred thirty-nine".