1949494906 has 4 divisors (see below), whose sum is σ = 2924242362. Its totient is φ = 974747452.

The previous prime is 1949494903. The next prime is 1949494931. The reversal of 1949494906 is 6094949491.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6094949491 = 53 ⋅114999047.

It can be written as a sum of positive squares in only one way, i.e., 1076824225 + 872670681 = 32815^2 + 29541^2 .

It is not an unprimeable number, because it can be changed into a prime (1949494901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487373725 + ... + 487373728.

Almost surely, 2^1949494906 is an apocalyptic number.

1949494906 is a deficient number, since it is larger than the sum of its proper divisors (974747456).

1949494906 is an equidigital number, since it uses as much as digits as its factorization.

1949494906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974747455.

The product of its (nonzero) digits is 2519424, while the sum is 55.

The square root of 1949494906 is about 44153.0848978868. The cubic root of 1949494906 is about 1249.2250996695.

The spelling of 1949494906 in words is "one billion, nine hundred forty-nine million, four hundred ninety-four thousand, nine hundred six".