653478073 has 2 divisors, whose sum is σ = 653478074. Its totient is φ = 653478072.

The previous prime is 653478071. The next prime is 653478143. The reversal of 653478073 is 370874356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 425679424 + 227798649 = 20632^2 + 15093^2 .

It is a cyclic number.

It is not a de Polignac number, because 653478073 - 2¹ = 653478071 is a prime.

Together with 653478071, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (653478071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326739036 + 326739037.

It is an arithmetic number, because the mean of its divisors is an integer number (326739037).

Almost surely, 2^653478073 is an apocalyptic number.

It is an amenable number.

653478073 is a deficient number, since it is larger than the sum of its proper divisors (1).

653478073 is an equidigital number, since it uses as much as digits as its factorization.

653478073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 43.

The square root of 653478073 is about 25563.2171879832. The cubic root of 653478073 is about 867.7814053273.

The spelling of 653478073 in words is "six hundred fifty-three million, four hundred seventy-eight thousand, seventy-three".