1900949949 has 12 divisors (see below), whose sum is σ = 2749009536. Its totient is φ = 1265826312.

The previous prime is 1900949933. The next prime is 1900949951. The reversal of 1900949949 is 9499490091.

It is not a de Polignac number, because 1900949949 - 2⁴ = 1900949933 is a prime.

It is a super-2 number, since 2×1900949949² = 7227221417206205202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1900949895 and 1900949904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1900949959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114607 + ... + 130140.

It is an arithmetic number, because the mean of its divisors is an integer number (229084128).

Almost surely, 2^1900949949 is an apocalyptic number.

It is an amenable number.

1900949949 is a deficient number, since it is larger than the sum of its proper divisors (848059587).

1900949949 is a wasteful number, since it uses less digits than its factorization.

1900949949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245616 (or 245613 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 54.

The square root of 1900949949 is about 43599.8847360862. The cubic root of 1900949949 is about 1238.7687112120.

The spelling of 1900949949 in words is "one billion, nine hundred million, nine hundred forty-nine thousand, nine hundred forty-nine".