64142473 has 2 divisors, whose sum is σ = 64142474. Its totient is φ = 64142472.

The previous prime is 64142471. The next prime is 64142489. The reversal of 64142473 is 37424146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55830784 + 8311689 = 7472^2 + 2883^2 .

It is a cyclic number.

It is not a de Polignac number, because 64142473 - 2¹ = 64142471 is a prime.

It is a super-2 number, since 2×64142473² = 8228513685111458, which contains 22 as substring.

Together with 64142471, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (64142471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32071236 + 32071237.

It is an arithmetic number, because the mean of its divisors is an integer number (32071237).

Almost surely, 2^64142473 is an apocalyptic number.

It is an amenable number.

64142473 is a deficient number, since it is larger than the sum of its proper divisors (1).

64142473 is an equidigital number, since it uses as much as digits as its factorization.

64142473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 31.

The square root of 64142473 is about 8008.8996123063. The cubic root of 64142473 is about 400.2965987686.

The spelling of 64142473 in words is "sixty-four million, one hundred forty-two thousand, four hundred seventy-three".