648309401 has 2 divisors, whose sum is σ = 648309402. Its totient is φ = 648309400.

The previous prime is 648309383. The next prime is 648309419. The reversal of 648309401 is 104903846.

It is a balanced prime because it is at equal distance from previous prime (648309383) and next prime (648309419).

It can be written as a sum of positive squares in only one way, i.e., 597558025 + 50751376 = 24445^2 + 7124^2 .

It is a cyclic number.

It is not a de Polignac number, because 648309401 - 2¹⁴ = 648293017 is a prime.

It is not a weakly prime, because it can be changed into another prime (648309421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324154700 + 324154701.

It is an arithmetic number, because the mean of its divisors is an integer number (324154701).

Almost surely, 2^648309401 is an apocalyptic number.

It is an amenable number.

648309401 is a deficient number, since it is larger than the sum of its proper divisors (1).

648309401 is an equidigital number, since it uses as much as digits as its factorization.

648309401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 648309401 is about 25461.9206070555. The cubic root of 648309401 is about 865.4874466465.

The spelling of 648309401 in words is "six hundred forty-eight million, three hundred nine thousand, four hundred one".