693861379457 has 2 divisors, whose sum is σ = 693861379458. Its totient is φ = 693861379456.

The previous prime is 693861379363. The next prime is 693861379459. The reversal of 693861379457 is 754973168396.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 671991702001 + 21869677456 = 819751^2 + 147884^2 .

It is a cyclic number.

It is not a de Polignac number, because 693861379457 - 2¹⁰ = 693861378433 is a prime.

It is a super-2 number, since 2×693861379457² (a number of 24 digits) contains 22 as substring.

Together with 693861379459, 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 (693861379459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346930689728 + 346930689729.

It is an arithmetic number, because the mean of its divisors is an integer number (346930689729).

Almost surely, 2^693861379457 is an apocalyptic number.

It is an amenable number.

693861379457 is a deficient number, since it is larger than the sum of its proper divisors (1).

693861379457 is an equidigital number, since it uses as much as digits as its factorization.

693861379457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 205752960, while the sum is 68.

The spelling of 693861379457 in words is "six hundred ninety-three billion, eight hundred sixty-one million, three hundred seventy-nine thousand, four hundred fifty-seven".