63670961 has 2 divisors, whose sum is σ = 63670962. Its totient is φ = 63670960.

The previous prime is 63670949. The next prime is 63670973. The reversal of 63670961 is 16907636.

It is a balanced prime because it is at equal distance from previous prime (63670949) and next prime (63670973).

It can be written as a sum of positive squares in only one way, i.e., 62710561 + 960400 = 7919^2 + 980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63670961 is a prime.

It is a Chen prime.

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

It is not a weakly prime, because it can be changed into another prime (63670261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31835480 + 31835481.

It is an arithmetic number, because the mean of its divisors is an integer number (31835481).

Almost surely, 2^63670961 is an apocalyptic number.

63670961 is the 3569-th centered decagonal number.

It is an amenable number.

63670961 is a deficient number, since it is larger than the sum of its proper divisors (1).

63670961 is an equidigital number, since it uses as much as digits as its factorization.

63670961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 63670961 is about 7979.4085620427. The cubic root of 63670961 is about 399.3133239479.

The spelling of 63670961 in words is "sixty-three million, six hundred seventy thousand, nine hundred sixty-one".