61550147 has 2 divisors, whose sum is σ = 61550148. Its totient is φ = 61550146.

The previous prime is 61550117. The next prime is 61550161. The reversal of 61550147 is 74105516.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61550147 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61550117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30775073 + 30775074.

It is an arithmetic number, because the mean of its divisors is an integer number (30775074).

Almost surely, 2^61550147 is an apocalyptic number.

61550147 is a deficient number, since it is larger than the sum of its proper divisors (1).

61550147 is an equidigital number, since it uses as much as digits as its factorization.

61550147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 61550147 is about 7845.3901751283. The cubic root of 61550147 is about 394.8295948192.

The spelling of 61550147 in words is "sixty-one million, five hundred fifty thousand, one hundred forty-seven".