63070921 has 2 divisors, whose sum is σ = 63070922. Its totient is φ = 63070920.

The previous prime is 63070907. The next prime is 63070927. The reversal of 63070921 is 12907036.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48163600 + 14907321 = 6940^2 + 3861^2 .

It is a cyclic number.

It is not a de Polignac number, because 63070921 - 2¹⁵ = 63038153 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 63070921.

It is not a weakly prime, because it can be changed into another prime (63070927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31535460 + 31535461.

It is an arithmetic number, because the mean of its divisors is an integer number (31535461).

Almost surely, 2^63070921 is an apocalyptic number.

It is an amenable number.

63070921 is a deficient number, since it is larger than the sum of its proper divisors (1).

63070921 is an equidigital number, since it uses as much as digits as its factorization.

63070921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 63070921 is about 7941.7202796372. The cubic root of 63070921 is about 398.0549762866.

Adding to 63070921 its reverse (12907036), we get a palindrome (75977957).

The spelling of 63070921 in words is "sixty-three million, seventy thousand, nine hundred twenty-one".