90078011 has 4 divisors (see below), whose sum is σ = 90103272. Its totient is φ = 90052752.

The previous prime is 90077989. The next prime is 90078013. The reversal of 90078011 is 11087009.

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

It is a cyclic number.

It is not a de Polignac number, because 90078011 - 2¹⁴ = 90061627 is a prime.

It is a super-2 number, since 2×90078011² = 16228096131432242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90078013) 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, 6185 + ... + 14778.

It is an arithmetic number, because the mean of its divisors is an integer number (22525818).

Almost surely, 2^90078011 is an apocalyptic number.

90078011 is a deficient number, since it is larger than the sum of its proper divisors (25261).

90078011 is a wasteful number, since it uses less digits than its factorization.

90078011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25260.

The product of its (nonzero) digits is 504, while the sum is 26.

The square root of 90078011 is about 9490.9436306407. The cubic root of 90078011 is about 448.2699183242.

The spelling of 90078011 in words is "ninety million, seventy-eight thousand, eleven".