90561394 has 16 divisors (see below), whose sum is σ = 169361856. Its totient is φ = 35283600.

The previous prime is 90561379. The next prime is 90561407. The reversal of 90561394 is 49316509.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293877 + ... + 294184.

It is an arithmetic number, because the mean of its divisors is an integer number (10585116).

Almost surely, 2^90561394 is an apocalyptic number.

90561394 is a deficient number, since it is larger than the sum of its proper divisors (78800462).

90561394 is a wasteful number, since it uses less digits than its factorization.

90561394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588081.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 90561394 is about 9516.3750451524. The cubic root of 90561394 is about 449.0703342017.

The spelling of 90561394 in words is "ninety million, five hundred sixty-one thousand, three hundred ninety-four".