61830149 has 4 divisors (see below), whose sum is σ = 62843820. Its totient is φ = 60816480.

The previous prime is 61830133. The next prime is 61830163. The reversal of 61830149 is 94103816.

It is a happy number.

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 27899524 + 33930625 = 5282^2 + 5825^2 .

It is a cyclic number.

It is not a de Polignac number, because 61830149 - 2⁴ = 61830133 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61880149) 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, 506744 + ... + 506865.

It is an arithmetic number, because the mean of its divisors is an integer number (15710955).

Almost surely, 2^61830149 is an apocalyptic number.

It is an amenable number.

61830149 is a deficient number, since it is larger than the sum of its proper divisors (1013671).

61830149 is a wasteful number, since it uses less digits than its factorization.

61830149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013670.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 61830149 is about 7863.2149277506. The cubic root of 61830149 is about 395.4274046944.

The spelling of 61830149 in words is "sixty-one million, eight hundred thirty thousand, one hundred forty-nine".