90949381 has 8 divisors (see below), whose sum is σ = 93993984. Its totient is φ = 87911760.

The previous prime is 90949379. The next prime is 90949421. The reversal of 90949381 is 18394909.

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 90949381 - 2¹ = 90949379 is a prime.

It is a super-2 number, since 2×90949381² = 16543579808566322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90949301) 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, 45111 + ... + 47083.

It is an arithmetic number, because the mean of its divisors is an integer number (11749248).

Almost surely, 2^90949381 is an apocalyptic number.

It is an amenable number.

90949381 is a deficient number, since it is larger than the sum of its proper divisors (3044603).

90949381 is a wasteful number, since it uses less digits than its factorization.

90949381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3491.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 90949381 is about 9536.7384886029. The cubic root of 90949381 is about 449.7107293161.

The spelling of 90949381 in words is "ninety million, nine hundred forty-nine thousand, three hundred eighty-one".