61457147 has 2 divisors, whose sum is σ = 61457148. Its totient is φ = 61457146.

The previous prime is 61457117. The next prime is 61457161. The reversal of 61457147 is 74175416.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61457147 - 2⁶ = 61457083 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61457117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30728573 + 30728574.

It is an arithmetic number, because the mean of its divisors is an integer number (30728574).

Almost surely, 2^61457147 is an apocalyptic number.

61457147 is a deficient number, since it is larger than the sum of its proper divisors (1).

61457147 is an equidigital number, since it uses as much as digits as its factorization.

61457147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23520, while the sum is 35.

The square root of 61457147 is about 7839.4608870764. The cubic root of 61457147 is about 394.6306369320.

The spelling of 61457147 in words is "sixty-one million, four hundred fifty-seven thousand, one hundred forty-seven".