170449457 has 4 divisors (see below), whose sum is σ = 171065076. Its totient is φ = 169833840.

The previous prime is 170449453. The next prime is 170449493. The reversal of 170449457 is 754944071.

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 25391521 + 145057936 = 5039^2 + 12044^2 .

It is a cyclic number.

It is not a de Polignac number, because 170449457 - 2² = 170449453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (170449453) 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, 307394 + ... + 307947.

It is an arithmetic number, because the mean of its divisors is an integer number (42766269).

Almost surely, 2^170449457 is an apocalyptic number.

It is an amenable number.

170449457 is a deficient number, since it is larger than the sum of its proper divisors (615619).

170449457 is an equidigital number, since it uses as much as digits as its factorization.

170449457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615618.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 170449457 is about 13055.6293222502. The cubic root of 170449457 is about 554.4535996232.

The spelling of 170449457 in words is "one hundred seventy million, four hundred forty-nine thousand, four hundred fifty-seven".