61673947 has 2 divisors, whose sum is σ = 61673948. Its totient is φ = 61673946.

The previous prime is 61673921. The next prime is 61673951. The reversal of 61673947 is 74937616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61673947 - 2⁷ = 61673819 is a prime.

It is not a weakly prime, because it can be changed into another prime (61673147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30836973 + 30836974.

It is an arithmetic number, because the mean of its divisors is an integer number (30836974).

Almost surely, 2^61673947 is an apocalyptic number.

61673947 is a deficient number, since it is larger than the sum of its proper divisors (1).

61673947 is an equidigital number, since it uses as much as digits as its factorization.

61673947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 43.

The square root of 61673947 is about 7853.2761953213. The cubic root of 61673947 is about 395.0941334161.

The spelling of 61673947 in words is "sixty-one million, six hundred seventy-three thousand, nine hundred forty-seven".