1354993657 has 2 divisors, whose sum is σ = 1354993658. Its totient is φ = 1354993656.

The previous prime is 1354993649. The next prime is 1354993669. The reversal of 1354993657 is 7563994531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1292330601 + 62663056 = 35949^2 + 7916^2 .

It is an emirp because it is prime and its reverse (7563994531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1354993657 - 2³ = 1354993649 is a prime.

It is a super-3 number, since 3×1354993657³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1354993357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677496828 + 677496829.

It is an arithmetic number, because the mean of its divisors is an integer number (677496829).

Almost surely, 2^1354993657 is an apocalyptic number.

It is an amenable number.

1354993657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1354993657 is an equidigital number, since it uses as much as digits as its factorization.

1354993657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3061800, while the sum is 52.

The square root of 1354993657 is about 36810.2384806184. The cubic root of 1354993657 is about 1106.5704979556.

The spelling of 1354993657 in words is "one billion, three hundred fifty-four million, nine hundred ninety-three thousand, six hundred fifty-seven".