90678061 has 4 divisors (see below), whose sum is σ = 90701532. Its totient is φ = 90654592.

The previous prime is 90678059. The next prime is 90678079. The reversal of 90678061 is 16087609.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38564100 + 52113961 = 6210^2 + 7219^2 .

It is a cyclic number.

It is not a de Polignac number, because 90678061 - 2¹ = 90678059 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90678061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90078061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4420 + ... + 14173.

It is an arithmetic number, because the mean of its divisors is an integer number (22675383).

Almost surely, 2^90678061 is an apocalyptic number.

It is an amenable number.

90678061 is a deficient number, since it is larger than the sum of its proper divisors (23471).

90678061 is a wasteful number, since it uses less digits than its factorization.

90678061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23470.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 90678061 is about 9522.5028747698. The cubic root of 90678061 is about 449.2630918597.

The spelling of 90678061 in words is "ninety million, six hundred seventy-eight thousand, sixty-one".