1949563493 has 4 divisors (see below), whose sum is σ = 1954707840. Its totient is φ = 1944419148.

The previous prime is 1949563487. The next prime is 1949563529. The reversal of 1949563493 is 3943659491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3943659491 = 827 ⋅4768633.

It is a cyclic number.

It is not a de Polignac number, because 1949563493 - 2²⁴ = 1932786277 is a prime.

It is a super-2 number, since 2×1949563493² = 7601595626476722098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1949563453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2571605 + ... + 2572362.

It is an arithmetic number, because the mean of its divisors is an integer number (488676960).

Almost surely, 2^1949563493 is an apocalyptic number.

It is an amenable number.

1949563493 is a deficient number, since it is larger than the sum of its proper divisors (5144347).

1949563493 is an equidigital number, since it uses as much as digits as its factorization.

1949563493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5144346.

The product of its digits is 3149280, while the sum is 53.

The square root of 1949563493 is about 44153.8615865023. The cubic root of 1949563493 is about 1249.2397495491.

The spelling of 1949563493 in words is "one billion, nine hundred forty-nine million, five hundred sixty-three thousand, four hundred ninety-three".