90943901 has 4 divisors (see below), whose sum is σ = 91793952. Its totient is φ = 90093852.

The previous prime is 90943889. The next prime is 90943933. The reversal of 90943901 is 10934909.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10934909 = 31 ⋅352739.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90943901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90943001) 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, 424865 + ... + 425078.

It is an arithmetic number, because the mean of its divisors is an integer number (22948488).

Almost surely, 2^90943901 is an apocalyptic number.

It is an amenable number.

90943901 is a deficient number, since it is larger than the sum of its proper divisors (850051).

90943901 is a wasteful number, since it uses less digits than its factorization.

90943901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850050.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 90943901 is about 9536.4511743101. The cubic root of 90943901 is about 449.7016969501.

The spelling of 90943901 in words is "ninety million, nine hundred forty-three thousand, nine hundred one".