801625961 has 2 divisors, whose sum is σ = 801625962. Its totient is φ = 801625960.

The previous prime is 801625943. The next prime is 801626011. The reversal of 801625961 is 169526108.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 457746025 + 343879936 = 21395^2 + 18544^2 .

It is a cyclic number.

It is not a de Polignac number, because 801625961 - 2⁶ = 801625897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (801624961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400812980 + 400812981.

It is an arithmetic number, because the mean of its divisors is an integer number (400812981).

Almost surely, 2^801625961 is an apocalyptic number.

It is an amenable number.

801625961 is a deficient number, since it is larger than the sum of its proper divisors (1).

801625961 is an equidigital number, since it uses as much as digits as its factorization.

801625961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 801625961 is about 28312.9998587221. Note that the first 3 decimals coincide. The cubic root of 801625961 is about 928.9462613216.

The spelling of 801625961 in words is "eight hundred one million, six hundred twenty-five thousand, nine hundred sixty-one".