1354537981 has 2 divisors, whose sum is σ = 1354537982. Its totient is φ = 1354537980.

The previous prime is 1354537939. The next prime is 1354537993. The reversal of 1354537981 is 1897354531.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1241434756 + 113103225 = 35234^2 + 10635^2 .

It is a cyclic number.

It is not a de Polignac number, because 1354537981 - 2⁷ = 1354537853 is a prime.

It is a super-2 number, since 2×1354537981² = 3669546283943112722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1354507981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677268990 + 677268991.

It is an arithmetic number, because the mean of its divisors is an integer number (677268991).

Almost surely, 2^1354537981 is an apocalyptic number.

It is an amenable number.

1354537981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1354537981 is an equidigital number, since it uses as much as digits as its factorization.

1354537981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 46.

The square root of 1354537981 is about 36804.0484322038. The cubic root of 1354537981 is about 1106.4464397727.

The spelling of 1354537981 in words is "one billion, three hundred fifty-four million, five hundred thirty-seven thousand, nine hundred eighty-one".