90378059 has 4 divisors (see below), whose sum is σ = 90437160. Its totient is φ = 90318960.

The previous prime is 90378047. The next prime is 90378073. The reversal of 90378059 is 95087309.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95087309 = 281 ⋅338389.

It is a cyclic number.

It is not a de Polignac number, because 90378059 - 2²⁴ = 73600843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90378359) 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, 27194 + ... + 30335.

It is an arithmetic number, because the mean of its divisors is an integer number (22609290).

Almost surely, 2^90378059 is an apocalyptic number.

90378059 is a deficient number, since it is larger than the sum of its proper divisors (59101).

90378059 is a wasteful number, since it uses less digits than its factorization.

90378059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59100.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 90378059 is about 9506.7375581742. The cubic root of 90378059 is about 448.7670926624.

The spelling of 90378059 in words is "ninety million, three hundred seventy-eight thousand, fifty-nine".