90643941 has 20 divisors (see below), whose sum is σ = 136321504. Its totient is φ = 60021000.

The previous prime is 90643933. The next prime is 90643963. The reversal of 90643941 is 14934609.

90643941 is a `hidden beast` number, since 9 + 0 + 643 + 9 + 4 + 1 = 666.

It is not a de Polignac number, because 90643941 - 2³ = 90643933 is a prime.

It is a super-2 number, since 2×90643941² = 16432648080022962, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90643896 and 90643905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90643921) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8526 + ... + 15936.

Almost surely, 2^90643941 is an apocalyptic number.

It is an amenable number.

90643941 is a deficient number, since it is larger than the sum of its proper divisors (45677563).

90643941 is a wasteful number, since it uses less digits than its factorization.

90643941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7574 (or 7565 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 90643941 is about 9520.7111604123. The cubic root of 90643941 is about 449.2067357814.

The spelling of 90643941 in words is "ninety million, six hundred forty-three thousand, nine hundred forty-one".