61798147 has 2 divisors, whose sum is σ = 61798148. Its totient is φ = 61798146.

The previous prime is 61798141. The next prime is 61798151. The reversal of 61798147 is 74189716.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61798147 - 2⁷ = 61798019 is a prime.

It is not a weakly prime, because it can be changed into another prime (61798141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30899073 + 30899074.

It is an arithmetic number, because the mean of its divisors is an integer number (30899074).

Almost surely, 2^61798147 is an apocalyptic number.

61798147 is a deficient number, since it is larger than the sum of its proper divisors (1).

61798147 is an equidigital number, since it uses as much as digits as its factorization.

61798147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 43.

The square root of 61798147 is about 7861.1797460687. The cubic root of 61798147 is about 395.3591712523.

The spelling of 61798147 in words is "sixty-one million, seven hundred ninety-eight thousand, one hundred forty-seven".