421687792786697 has 2 divisors, whose sum is σ = 421687792786698. Its totient is φ = 421687792786696.

The previous prime is 421687792786657. The next prime is 421687792786763. The reversal of 421687792786697 is 796687297786124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 380699256618256 + 40988536168441 = 19511516^2 + 6402229^2 .

It is a cyclic number.

It is not a de Polignac number, because 421687792786697 - 2⁶ = 421687792786633 is a prime.

It is a super-3 number, since 3×421687792786697³ (a number of 45 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (421687792786657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210843896393348 + 210843896393349.

It is an arithmetic number, because the mean of its divisors is an integer number (210843896393349).

Almost surely, 2^{421687792786697} is an apocalyptic number.

It is an amenable number.

421687792786697 is a deficient number, since it is larger than the sum of its proper divisors (1).

421687792786697 is an equidigital number, since it uses as much as digits as its factorization.

421687792786697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43016085504, while the sum is 89.

The spelling of 421687792786697 in words is "four hundred twenty-one trillion, six hundred eighty-seven billion, seven hundred ninety-two million, seven hundred eighty-six thousand, six hundred ninety-seven".