648923071 has 2 divisors, whose sum is σ = 648923072. Its totient is φ = 648923070.

The previous prime is 648923069. The next prime is 648923141. The reversal of 648923071 is 170329846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 648923071 - 2¹ = 648923069 is a prime.

It is a super-2 number, since 2×648923071² = 842202304152142082, which contains 22 as substring.

Together with 648923069, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648923021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324461535 + 324461536.

It is an arithmetic number, because the mean of its divisors is an integer number (324461536).

Almost surely, 2^648923071 is an apocalyptic number.

648923071 is a deficient number, since it is larger than the sum of its proper divisors (1).

648923071 is an equidigital number, since it uses as much as digits as its factorization.

648923071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 648923071 is about 25473.9684972719. The cubic root of 648923071 is about 865.7604419102.

The spelling of 648923071 in words is "six hundred forty-eight million, nine hundred twenty-three thousand, seventy-one".