1949090801 has 4 divisors (see below), whose sum is σ = 2227532352. Its totient is φ = 1670649252.

The previous prime is 1949090777. The next prime is 1949090809. The reversal of 1949090801 is 1080909491.

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.

It is a cyclic number.

It is not a de Polignac number, because 1949090801 - 2³⁰ = 875348977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1949090809) 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, 139220765 + ... + 139220778.

It is an arithmetic number, because the mean of its divisors is an integer number (556883088).

Almost surely, 2^1949090801 is an apocalyptic number.

It is an amenable number.

1949090801 is a deficient number, since it is larger than the sum of its proper divisors (278441551).

1949090801 is an equidigital number, since it uses as much as digits as its factorization.

1949090801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278441550.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 1949090801 is about 44148.5084799022. The cubic root of 1949090801 is about 1249.1387776531.

The spelling of 1949090801 in words is "one billion, nine hundred forty-nine million, ninety thousand, eight hundred one".