61097947 has 2 divisors, whose sum is σ = 61097948. Its totient is φ = 61097946.

The previous prime is 61097941. The next prime is 61097957. The reversal of 61097947 is 74979016.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61097947 - 2¹¹ = 61095899 is a prime.

It is a super-2 number, since 2×61097947² = 7465918255229618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61097941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30548973 + 30548974.

It is an arithmetic number, because the mean of its divisors is an integer number (30548974).

Almost surely, 2^61097947 is an apocalyptic number.

61097947 is a deficient number, since it is larger than the sum of its proper divisors (1).

61097947 is an equidigital number, since it uses as much as digits as its factorization.

61097947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 61097947 is about 7816.5175749818. The cubic root of 61097947 is about 393.8602985868.

The spelling of 61097947 in words is "sixty-one million, ninety-seven thousand, nine hundred forty-seven".