695887121 has 2 divisors, whose sum is σ = 695887122. Its totient is φ = 695887120.

The previous prime is 695887099. The next prime is 695887147. The reversal of 695887121 is 121788596.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 688537600 + 7349521 = 26240^2 + 2711^2 .

It is a cyclic number.

It is not a de Polignac number, because 695887121 - 2²⁶ = 628778257 is a prime.

It is not a weakly prime, because it can be changed into another prime (695887421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347943560 + 347943561.

It is an arithmetic number, because the mean of its divisors is an integer number (347943561).

Almost surely, 2^695887121 is an apocalyptic number.

It is an amenable number.

695887121 is a deficient number, since it is larger than the sum of its proper divisors (1).

695887121 is an equidigital number, since it uses as much as digits as its factorization.

695887121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 47.

The square root of 695887121 is about 26379.6724960717. The cubic root of 695887121 is about 886.1616125316.

The spelling of 695887121 in words is "six hundred ninety-five million, eight hundred eighty-seven thousand, one hundred twenty-one".