2257849897 has 4 divisors (see below), whose sum is σ = 2335706820. Its totient is φ = 2179992976.

The previous prime is 2257849889. The next prime is 2257849903. The reversal of 2257849897 is 7989487522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7989487522 = 2 ⋅3994743761.

It can be written as a sum of positive squares in 2 ways, for example, as 429774361 + 1828075536 = 20731^2 + 42756^2 .

It is a cyclic number.

It is not a de Polignac number, because 2257849897 - 2³ = 2257849889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2257849807) 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, 38928418 + ... + 38928475.

It is an arithmetic number, because the mean of its divisors is an integer number (583926705).

Almost surely, 2^2257849897 is an apocalyptic number.

It is an amenable number.

2257849897 is a deficient number, since it is larger than the sum of its proper divisors (77856923).

2257849897 is an equidigital number, since it uses as much as digits as its factorization.

2257849897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77856922.

The product of its digits is 20321280, while the sum is 61.

The square root of 2257849897 is about 47516.8380366371. The cubic root of 2257849897 is about 1311.8928209173.

The spelling of 2257849897 in words is "two billion, two hundred fifty-seven million, eight hundred forty-nine thousand, eight hundred ninety-seven".