945642491 has 8 divisors (see below), whose sum is σ = 989319744. Its totient is φ = 902946880.

The previous prime is 945642449. The next prime is 945642499. The reversal of 945642491 is 194246549.

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 945642491 - 2¹⁰ = 945641467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (945642499) 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, 243440 + ... + 247293.

It is an arithmetic number, because the mean of its divisors is an integer number (123664968).

Almost surely, 2^945642491 is an apocalyptic number.

945642491 is a deficient number, since it is larger than the sum of its proper divisors (43677253).

945642491 is a wasteful number, since it uses less digits than its factorization.

945642491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490821.

The product of its digits is 311040, while the sum is 44.

The square root of 945642491 is about 30751.3006391600. The cubic root of 945642491 is about 981.5422374540.

The spelling of 945642491 in words is "nine hundred forty-five million, six hundred forty-two thousand, four hundred ninety-one".