61147897 has 2 divisors, whose sum is σ = 61147898. Its totient is φ = 61147896.

The previous prime is 61147883. The next prime is 61147901. The reversal of 61147897 is 79874116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42042256 + 19105641 = 6484^2 + 4371^2 .

It is a cyclic number.

It is not a de Polignac number, because 61147897 - 2¹¹ = 61145849 is a prime.

It is not a weakly prime, because it can be changed into another prime (61147297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30573948 + 30573949.

It is an arithmetic number, because the mean of its divisors is an integer number (30573949).

Almost surely, 2^61147897 is an apocalyptic number.

It is an amenable number.

61147897 is a deficient number, since it is larger than the sum of its proper divisors (1).

61147897 is an equidigital number, since it uses as much as digits as its factorization.

61147897 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 61147897 is about 7819.7120790986. The cubic root of 61147897 is about 393.9676014999.

The spelling of 61147897 in words is "sixty-one million, one hundred forty-seven thousand, eight hundred ninety-seven".