74709961 has 2 divisors, whose sum is σ = 74709962. Its totient is φ = 74709960.

The previous prime is 74709959. The next prime is 74709967. The reversal of 74709961 is 16990747.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38937600 + 35772361 = 6240^2 + 5981^2 .

It is a cyclic number.

It is not a de Polignac number, because 74709961 - 2¹ = 74709959 is a prime.

Together with 74709959, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (74709967) 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, 37354980 + 37354981.

It is an arithmetic number, because the mean of its divisors is an integer number (37354981).

Almost surely, 2^74709961 is an apocalyptic number.

It is an amenable number.

74709961 is a deficient number, since it is larger than the sum of its proper divisors (1).

74709961 is an equidigital number, since it uses as much as digits as its factorization.

74709961 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 74709961 is about 8643.4924075862. The cubic root of 74709961 is about 421.1720117903.

The spelling of 74709961 in words is "seventy-four million, seven hundred nine thousand, nine hundred sixty-one".