648248901 has 4 divisors (see below), whose sum is σ = 864331872. Its totient is φ = 432165932.

The previous prime is 648248873. The next prime is 648248903. The reversal of 648248901 is 109842846.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 648248901 - 2⁶ = 648248837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648248903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108041481 + ... + 108041486.

It is an arithmetic number, because the mean of its divisors is an integer number (216082968).

Almost surely, 2^648248901 is an apocalyptic number.

It is an amenable number.

648248901 is a deficient number, since it is larger than the sum of its proper divisors (216082971).

648248901 is a wasteful number, since it uses less digits than its factorization.

648248901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216082970.

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 648248901 is about 25460.7325307030. The cubic root of 648248901 is about 865.4605234833.

The spelling of 648248901 in words is "six hundred forty-eight million, two hundred forty-eight thousand, nine hundred one".