945355091 has 4 divisors (see below), whose sum is σ = 1000964232. Its totient is φ = 889745952.

The previous prime is 945355087. The next prime is 945355111. The reversal of 945355091 is 190553549.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190553549 = 571 ⋅333719.

It is a cyclic number.

It is not a de Polignac number, because 945355091 - 2² = 945355087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (945355031) 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, 27804545 + ... + 27804578.

It is an arithmetic number, because the mean of its divisors is an integer number (250241058).

Almost surely, 2^945355091 is an apocalyptic number.

945355091 is a deficient number, since it is larger than the sum of its proper divisors (55609141).

945355091 is a wasteful number, since it uses less digits than its factorization.

945355091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55609140.

The product of its (nonzero) digits is 121500, while the sum is 41.

The square root of 945355091 is about 30746.6273109751. The cubic root of 945355091 is about 981.4427904908.

The spelling of 945355091 in words is "nine hundred forty-five million, three hundred fifty-five thousand, ninety-one".