945420857 has 4 divisors (see below), whose sum is σ = 975918336. Its totient is φ = 914923380.

The previous prime is 945420787. The next prime is 945420859. The reversal of 945420857 is 758024549.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 945420857 - 2¹⁰ = 945419833 is a prime.

It is a super-2 number, since 2×945420857² = 1787641193701228898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (945420859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15248693 + ... + 15248754.

It is an arithmetic number, because the mean of its divisors is an integer number (243979584).

Almost surely, 2^945420857 is an apocalyptic number.

It is an amenable number.

945420857 is a deficient number, since it is larger than the sum of its proper divisors (30497479).

945420857 is a wasteful number, since it uses less digits than its factorization.

945420857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30497478.

The product of its (nonzero) digits is 403200, while the sum is 44.

The square root of 945420857 is about 30747.6967755310. The cubic root of 945420857 is about 981.4655488069.

The spelling of 945420857 in words is "nine hundred forty-five million, four hundred twenty thousand, eight hundred fifty-seven".