1552289491 has 2 divisors, whose sum is σ = 1552289492. Its totient is φ = 1552289490.

The previous prime is 1552289477. The next prime is 1552289581. The reversal of 1552289491 is 1949822551.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1949822551) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1552289491 is a prime.

It is not a weakly prime, because it can be changed into another prime (1552289411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776144745 + 776144746.

It is an arithmetic number, because the mean of its divisors is an integer number (776144746).

Almost surely, 2^1552289491 is an apocalyptic number.

1552289491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1552289491 is an equidigital number, since it uses as much as digits as its factorization.

1552289491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 46.

The square root of 1552289491 is about 39399.1052055754. The cubic root of 1552289491 is about 1157.8640567037.

The spelling of 1552289491 in words is "one billion, five hundred fifty-two million, two hundred eighty-nine thousand, four hundred ninety-one".