90963781 has 8 divisors (see below), whose sum is σ = 96528960. Its totient is φ = 85532832.

The previous prime is 90963739. The next prime is 90963799. The reversal of 90963781 is 18736909.

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

It is a cyclic number.

It is not a de Polignac number, because 90963781 - 2¹¹ = 90961733 is a prime.

It is a super-2 number, since 2×90963781² = 16548818907631922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90963581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32160 + ... + 34873.

It is an arithmetic number, because the mean of its divisors is an integer number (12066120).

Almost surely, 2^90963781 is an apocalyptic number.

It is an amenable number.

90963781 is a deficient number, since it is larger than the sum of its proper divisors (5565179).

90963781 is a wasteful number, since it uses less digits than its factorization.

90963781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67115.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 90963781 is about 9537.4934338116. The cubic root of 90963781 is about 449.7344622713.

The spelling of 90963781 in words is "ninety million, nine hundred sixty-three thousand, seven hundred eighty-one".