90783551 has 2 divisors, whose sum is σ = 90783552. Its totient is φ = 90783550.

The previous prime is 90783521. The next prime is 90783559. The reversal of 90783551 is 15538709.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90783551 - 2¹⁴ = 90767167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90783559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45391775 + 45391776.

It is an arithmetic number, because the mean of its divisors is an integer number (45391776).

Almost surely, 2^90783551 is an apocalyptic number.

90783551 is a deficient number, since it is larger than the sum of its proper divisors (1).

90783551 is an equidigital number, since it uses as much as digits as its factorization.

90783551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 90783551 is about 9528.0402497051. The cubic root of 90783551 is about 449.4372405525.

The spelling of 90783551 in words is "ninety million, seven hundred eighty-three thousand, five hundred fifty-one".