61090657 has 4 divisors (see below), whose sum is σ = 61172116. Its totient is φ = 61009200.

The previous prime is 61090651. The next prime is 61090669. The reversal of 61090657 is 75609016.

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 41589601 + 19501056 = 6449^2 + 4416^2 .

It is a cyclic number.

It is not a de Polignac number, because 61090657 - 2¹¹ = 61088609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61090651) 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, 39594 + ... + 41107.

It is an arithmetic number, because the mean of its divisors is an integer number (15293029).

Almost surely, 2^61090657 is an apocalyptic number.

It is an amenable number.

61090657 is a deficient number, since it is larger than the sum of its proper divisors (81459).

61090657 is an equidigital number, since it uses as much as digits as its factorization.

61090657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81458.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 61090657 is about 7816.0512408760. The cubic root of 61090657 is about 393.8446332716.

The spelling of 61090657 in words is "sixty-one million, ninety thousand, six hundred fifty-seven".