64742147 has 2 divisors, whose sum is σ = 64742148. Its totient is φ = 64742146.

The previous prime is 64742143. The next prime is 64742149. The reversal of 64742147 is 74124746.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64742147 - 2² = 64742143 is a prime.

Together with 64742149, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 14.

It is not a weakly prime, because it can be changed into another prime (64742143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32371073 + 32371074.

It is an arithmetic number, because the mean of its divisors is an integer number (32371074).

Almost surely, 2^64742147 is an apocalyptic number.

64742147 is a deficient number, since it is larger than the sum of its proper divisors (1).

64742147 is an equidigital number, since it uses as much as digits as its factorization.

64742147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37632, while the sum is 35.

The square root of 64742147 is about 8046.2504932422. The cubic root of 64742147 is about 401.5402014204.

The spelling of 64742147 in words is "sixty-four million, seven hundred forty-two thousand, one hundred forty-seven".