381698497 has 2 divisors, whose sum is σ = 381698498. Its totient is φ = 381698496.

The previous prime is 381698453. The next prime is 381698507. The reversal of 381698497 is 794896183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 372644416 + 9054081 = 19304^2 + 3009^2 .

It is a cyclic number.

It is not a de Polignac number, because 381698497 - 2¹⁵ = 381665729 is a prime.

It is a super-3 number, since 3×381698497³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (381698407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190849248 + 190849249.

It is an arithmetic number, because the mean of its divisors is an integer number (190849249).

Almost surely, 2^381698497 is an apocalyptic number.

It is an amenable number.

381698497 is a deficient number, since it is larger than the sum of its proper divisors (1).

381698497 is an equidigital number, since it uses as much as digits as its factorization.

381698497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 55.

The square root of 381698497 is about 19537.1056454123. The cubic root of 381698497 is about 725.3932053343.

The spelling of 381698497 in words is "three hundred eighty-one million, six hundred ninety-eight thousand, four hundred ninety-seven".