945537491 has 4 divisors (see below), whose sum is σ = 957506400. Its totient is φ = 933568584.

The previous prime is 945537443. The next prime is 945537497. The reversal of 945537491 is 194735549.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 945537491 - 2¹⁰ = 945536467 is a prime.

It is a super-2 number, since 2×945537491² = 1788082293773150162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (945537497) 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, 5984336 + ... + 5984493.

It is an arithmetic number, because the mean of its divisors is an integer number (239376600).

Almost surely, 2^945537491 is an apocalyptic number.

945537491 is a deficient number, since it is larger than the sum of its proper divisors (11968909).

945537491 is a wasteful number, since it uses less digits than its factorization.

945537491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11968908.

The product of its digits is 680400, while the sum is 47.

The square root of 945537491 is about 30749.5933469046. The cubic root of 945537491 is about 981.5059073925.

The spelling of 945537491 in words is "nine hundred forty-five million, five hundred thirty-seven thousand, four hundred ninety-one".