61764971 has 2 divisors, whose sum is σ = 61764972. Its totient is φ = 61764970.

The previous prime is 61764947. The next prime is 61765027. The reversal of 61764971 is 17946716.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61764971 - 2⁶ = 61764907 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61761971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30882485 + 30882486.

It is an arithmetic number, because the mean of its divisors is an integer number (30882486).

Almost surely, 2^61764971 is an apocalyptic number.

61764971 is a deficient number, since it is larger than the sum of its proper divisors (1).

61764971 is an equidigital number, since it uses as much as digits as its factorization.

61764971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 41.

The square root of 61764971 is about 7859.0693469392. The cubic root of 61764971 is about 395.2884097794.

The spelling of 61764971 in words is "sixty-one million, seven hundred sixty-four thousand, nine hundred seventy-one".