61830147 has 4 divisors (see below), whose sum is σ = 82440200. Its totient is φ = 41220096.

The previous prime is 61830133. The next prime is 61830163. The reversal of 61830147 is 74103816.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61830147 - 2⁷ = 61830019 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61834147) 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, 10305022 + ... + 10305027.

It is an arithmetic number, because the mean of its divisors is an integer number (20610050).

Almost surely, 2^61830147 is an apocalyptic number.

61830147 is a deficient number, since it is larger than the sum of its proper divisors (20610053).

61830147 is a wasteful number, since it uses less digits than its factorization.

61830147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20610052.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 61830147 is about 7863.2148005762. The cubic root of 61830147 is about 395.4274004308.

The spelling of 61830147 in words is "sixty-one million, eight hundred thirty thousand, one hundred forty-seven".