90647747 has 2 divisors, whose sum is σ = 90647748. Its totient is φ = 90647746.

The previous prime is 90647737. The next prime is 90647749. The reversal of 90647747 is 74774609.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90647747 - 2⁴ = 90647731 is a prime.

Together with 90647749, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 90647698 and 90647707.

It is not a weakly prime, because it can be changed into another prime (90647749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45323873 + 45323874.

It is an arithmetic number, because the mean of its divisors is an integer number (45323874).

Almost surely, 2^90647747 is an apocalyptic number.

90647747 is a deficient number, since it is larger than the sum of its proper divisors (1).

90647747 is an equidigital number, since it uses as much as digits as its factorization.

90647747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 296352, while the sum is 44.

The square root of 90647747 is about 9520.9110383408. The cubic root of 90647747 is about 449.2130228606.

The spelling of 90647747 in words is "ninety million, six hundred forty-seven thousand, seven hundred forty-seven".