610121090 has 16 divisors (see below), whose sum is σ = 1100199672. Its totient is φ = 243608064.

The previous prime is 610121063. The next prime is 610121093. The reversal of 610121090 is 90121016.

It can be written as a sum of positive squares in 4 ways, for example, as 507645961 + 102475129 = 22531^2 + 10123^2 .

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (610121093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49199 + ... + 60338.

Almost surely, 2^610121090 is an apocalyptic number.

610121090 is a deficient number, since it is larger than the sum of its proper divisors (490078582).

610121090 is a wasteful number, since it uses less digits than its factorization.

610121090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110101.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 610121090 is about 24700.6293442090. The cubic root of 610121090 is about 848.1487229141.

The spelling of 610121090 in words is "six hundred ten million, one hundred twenty-one thousand, ninety".