90748649 has 2 divisors, whose sum is σ = 90748650. Its totient is φ = 90748648.

The previous prime is 90748633. The next prime is 90748657. The reversal of 90748649 is 94684709.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50197225 + 40551424 = 7085^2 + 6368^2 .

It is a cyclic number.

It is not a de Polignac number, because 90748649 - 2⁴ = 90748633 is a prime.

It is not a weakly prime, because it can be changed into another prime (90748699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45374324 + 45374325.

It is an arithmetic number, because the mean of its divisors is an integer number (45374325).

Almost surely, 2^90748649 is an apocalyptic number.

It is an amenable number.

90748649 is a deficient number, since it is larger than the sum of its proper divisors (1).

90748649 is an equidigital number, since it uses as much as digits as its factorization.

90748649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 90748649 is about 9526.2085322546. The cubic root of 90748649 is about 449.3796373523.

The spelling of 90748649 in words is "ninety million, seven hundred forty-eight thousand, six hundred forty-nine".