695429821 has 2 divisors, whose sum is σ = 695429822. Its totient is φ = 695429820.

The previous prime is 695429807. The next prime is 695429869. The reversal of 695429821 is 128924596.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 452412900 + 243016921 = 21270^2 + 15589^2 .

It is a cyclic number.

It is not a de Polignac number, because 695429821 - 2²¹ = 693332669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (695429881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347714910 + 347714911.

It is an arithmetic number, because the mean of its divisors is an integer number (347714911).

Almost surely, 2^695429821 is an apocalyptic number.

It is an amenable number.

695429821 is a deficient number, since it is larger than the sum of its proper divisors (1).

695429821 is an equidigital number, since it uses as much as digits as its factorization.

695429821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 46.

The square root of 695429821 is about 26371.0034128396. The cubic root of 695429821 is about 885.9674572376.

The spelling of 695429821 in words is "six hundred ninety-five million, four hundred twenty-nine thousand, eight hundred twenty-one".