945121549 has 4 divisors (see below), whose sum is σ = 946114236. Its totient is φ = 944128864.

The previous prime is 945121523. The next prime is 945121577.

945121549 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in 2 ways, for example, as 575136324 + 369985225 = 23982^2 + 19235^2 .

It is a cyclic number.

It is not a de Polignac number, because 945121549 - 2⁵ = 945121517 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 (945121519) 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, 494914 + ... + 496819.

It is an arithmetic number, because the mean of its divisors is an integer number (236528559).

Almost surely, 2^945121549 is an apocalyptic number.

It is an amenable number.

945121549 is a deficient number, since it is larger than the sum of its proper divisors (992687).

945121549 is an equidigital number, since it uses as much as digits as its factorization.

945121549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992686.

The product of its digits is 64800, while the sum is 40.

The square root of 945121549 is about 30742.8292289438. The cubic root of 945121549 is about 981.3619647808.

The spelling of 945121549 in words is "nine hundred forty-five million, one hundred twenty-one thousand, five hundred forty-nine".