691702043 has 2 divisors, whose sum is σ = 691702044. Its totient is φ = 691702042.

The previous prime is 691702031. The next prime is 691702051. The reversal of 691702043 is 340207196.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 691702043 - 2²⁴ = 674924827 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (691722043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345851021 + 345851022.

It is an arithmetic number, because the mean of its divisors is an integer number (345851022).

Almost surely, 2^691702043 is an apocalyptic number.

691702043 is a deficient number, since it is larger than the sum of its proper divisors (1).

691702043 is an equidigital number, since it uses as much as digits as its factorization.

691702043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 691702043 is about 26300.2289533761. The cubic root of 691702043 is about 884.3815752536.

The spelling of 691702043 in words is "six hundred ninety-one million, seven hundred two thousand, forty-three".