692421641 has 2 divisors, whose sum is σ = 692421642. Its totient is φ = 692421640.

The previous prime is 692421637. The next prime is 692421643. The reversal of 692421641 is 146124296.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 665433616 + 26988025 = 25796^2 + 5195^2 .

It is a cyclic number.

It is not a de Polignac number, because 692421641 - 2² = 692421637 is a prime.

Together with 692421643, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (692421643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346210820 + 346210821.

It is an arithmetic number, because the mean of its divisors is an integer number (346210821).

Almost surely, 2^692421641 is an apocalyptic number.

It is an amenable number.

692421641 is a deficient number, since it is larger than the sum of its proper divisors (1).

692421641 is an equidigital number, since it uses as much as digits as its factorization.

692421641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 35.

The square root of 692421641 is about 26313.9058484293. The cubic root of 692421641 is about 884.6881516947.

The spelling of 692421641 in words is "six hundred ninety-two million, four hundred twenty-one thousand, six hundred forty-one".