90734789 has 2 divisors, whose sum is σ = 90734790. Its totient is φ = 90734788.

The previous prime is 90734783. The next prime is 90734801. The reversal of 90734789 is 98743709.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64673764 + 26061025 = 8042^2 + 5105^2 .

It is a cyclic number.

It is not a de Polignac number, because 90734789 - 2¹² = 90730693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90734783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45367394 + 45367395.

It is an arithmetic number, because the mean of its divisors is an integer number (45367395).

Almost surely, 2^90734789 is an apocalyptic number.

It is an amenable number.

90734789 is a deficient number, since it is larger than the sum of its proper divisors (1).

90734789 is an equidigital number, since it uses as much as digits as its factorization.

90734789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 90734789 is about 9525.4810377219. The cubic root of 90734789 is about 449.3567583381.

The spelling of 90734789 in words is "ninety million, seven hundred thirty-four thousand, seven hundred eighty-nine".