1554933491 has 2 divisors, whose sum is σ = 1554933492. Its totient is φ = 1554933490.

The previous prime is 1554933461. The next prime is 1554933503. The reversal of 1554933491 is 1943394551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1554933491 - 2¹⁴ = 1554917107 is a prime.

It is a super-2 number, since 2×1554933491² = 4835636322866894162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1554933431) 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, 777466745 + 777466746.

It is an arithmetic number, because the mean of its divisors is an integer number (777466746).

Almost surely, 2^1554933491 is an apocalyptic number.

1554933491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1554933491 is an equidigital number, since it uses as much as digits as its factorization.

1554933491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 291600, while the sum is 44.

The square root of 1554933491 is about 39432.6449911745. The cubic root of 1554933491 is about 1158.5210767762.

The spelling of 1554933491 in words is "one billion, five hundred fifty-four million, nine hundred thirty-three thousand, four hundred ninety-one".