109457657 has 4 divisors (see below), whose sum is σ = 110256756. Its totient is φ = 108658560.

The previous prime is 109457653. The next prime is 109457671. The reversal of 109457657 is 756754901.

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 59274601 + 50183056 = 7699^2 + 7084^2 .

It is a cyclic number.

It is not a de Polignac number, because 109457657 - 2² = 109457653 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109457653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 399344 + ... + 399617.

It is an arithmetic number, because the mean of its divisors is an integer number (27564189).

Almost surely, 2^109457657 is an apocalyptic number.

It is an amenable number.

109457657 is a deficient number, since it is larger than the sum of its proper divisors (799099).

109457657 is an equidigital number, since it uses as much as digits as its factorization.

109457657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799098.

The product of its (nonzero) digits is 264600, while the sum is 44.

The square root of 109457657 is about 10462.2013457972. The cubic root of 109457657 is about 478.3532355702.

The spelling of 109457657 in words is "one hundred nine million, four hundred fifty-seven thousand, six hundred fifty-seven".