1354877989 has 2 divisors, whose sum is σ = 1354877990. Its totient is φ = 1354877988.

The previous prime is 1354877987. The next prime is 1354878059. The reversal of 1354877989 is 9897784531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1331520100 + 23357889 = 36490^2 + 4833^2 .

It is an emirp because it is prime and its reverse (9897784531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1354877989 - 2¹ = 1354877987 is a prime.

Together with 1354877987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1354877983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677438994 + 677438995.

It is an arithmetic number, because the mean of its divisors is an integer number (677438995).

Almost surely, 2^1354877989 is an apocalyptic number.

It is an amenable number.

1354877989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1354877989 is an equidigital number, since it uses as much as digits as its factorization.

1354877989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15240960, while the sum is 61.

The square root of 1354877989 is about 36808.6673081219. The cubic root of 1354877989 is about 1106.5390098775.

The spelling of 1354877989 in words is "one billion, three hundred fifty-four million, eight hundred seventy-seven thousand, nine hundred eighty-nine".