3648977021 has 2 divisors, whose sum is σ = 3648977022. Its totient is φ = 3648977020.

The previous prime is 3648977011. The next prime is 3648977027. The reversal of 3648977021 is 1207798463.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3319372996 + 329604025 = 57614^2 + 18155^2 .

It is an emirp because it is prime and its reverse (1207798463) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3648977021 - 2⁶ = 3648976957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3648977027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1824488510 + 1824488511.

It is an arithmetic number, because the mean of its divisors is an integer number (1824488511).

Almost surely, 2^3648977021 is an apocalyptic number.

It is an amenable number.

3648977021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3648977021 is an equidigital number, since it uses as much as digits as its factorization.

3648977021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 3648977021 is about 60406.7630402424. The cubic root of 3648977021 is about 1539.5378695720.

The spelling of 3648977021 in words is "three billion, six hundred forty-eight million, nine hundred seventy-seven thousand, twenty-one".