648418087 has 2 divisors, whose sum is σ = 648418088. Its totient is φ = 648418086.

The previous prime is 648418061. The next prime is 648418091. The reversal of 648418087 is 780814846.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648418087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648418387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324209043 + 324209044.

It is an arithmetic number, because the mean of its divisors is an integer number (324209044).

Almost surely, 2^648418087 is an apocalyptic number.

648418087 is a deficient number, since it is larger than the sum of its proper divisors (1).

648418087 is an equidigital number, since it uses as much as digits as its factorization.

648418087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 344064, while the sum is 46.

The square root of 648418087 is about 25464.0548028000. The cubic root of 648418087 is about 865.5358089009.

The spelling of 648418087 in words is "six hundred forty-eight million, four hundred eighteen thousand, eighty-seven".