90521078 has 8 divisors (see below), whose sum is σ = 136131840. Its totient is φ = 45143800.

The previous prime is 90521051. The next prime is 90521083. The reversal of 90521078 is 87012509.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57398 + ... + 58953.

It is an arithmetic number, because the mean of its divisors is an integer number (17016480).

Almost surely, 2^90521078 is an apocalyptic number.

90521078 is a deficient number, since it is larger than the sum of its proper divisors (45610762).

90521078 is a wasteful number, since it uses less digits than its factorization.

90521078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116742.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 90521078 is about 9514.2565658069. The cubic root of 90521078 is about 449.0036854673.

The spelling of 90521078 in words is "ninety million, five hundred twenty-one thousand, seventy-eight".