1909797950 has 24 divisors (see below), whose sum is σ = 3553446672. Its totient is φ = 763656320.

The previous prime is 1909797937. The next prime is 1909797961. The reversal of 1909797950 is 597979091.

It is a congruent number.

It is an unprimeable number.

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, 212447 + ... + 221253.

It is an arithmetic number, because the mean of its divisors is an integer number (148060278).

Almost surely, 2^1909797950 is an apocalyptic number.

1909797950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1909797950 is a deficient number, since it is larger than the sum of its proper divisors (1643648722).

1909797950 is a wasteful number, since it uses less digits than its factorization.

1909797950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13156 (or 13151 counting only the distinct ones).

The product of its (nonzero) digits is 1607445, while the sum is 56.

The square root of 1909797950 is about 43701.2351084040. The cubic root of 1909797950 is about 1240.6876930294.

The spelling of 1909797950 in words is "one billion, nine hundred nine million, seven hundred ninety-seven thousand, nine hundred fifty".