1946949491 has 2 divisors, whose sum is σ = 1946949492. Its totient is φ = 1946949490.

The previous prime is 1946949461. The next prime is 1946949553. The reversal of 1946949491 is 1949496491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1946949491 - 2¹⁰ = 1946948467 is a prime.

It is a super-3 number, since 3×1946949491³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1946949401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 973474745 + 973474746.

It is an arithmetic number, because the mean of its divisors is an integer number (973474746).

Almost surely, 2^1946949491 is an apocalyptic number.

1946949491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1946949491 is an equidigital number, since it uses as much as digits as its factorization.

1946949491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2519424, while the sum is 56.

The square root of 1946949491 is about 44124.2505998685. The cubic root of 1946949491 is about 1248.6811671132.

The spelling of 1946949491 in words is "one billion, nine hundred forty-six million, nine hundred forty-nine thousand, four hundred ninety-one".