1930121949 has 12 divisors (see below), whose sum is σ = 2941445024. Its totient is φ = 1102811784.

The previous prime is 1930121939. The next prime is 1930121959. The reversal of 1930121949 is 9491210391.

It is an interprime number because it is at equal distance from previous prime (1930121939) and next prime (1930121959).

It is not a de Polignac number, because 1930121949 - 2⁴ = 1930121933 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1930121939) 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, 196534 + ... + 206120.

Almost surely, 2^1930121949 is an apocalyptic number.

It is an amenable number.

1930121949 is a deficient number, since it is larger than the sum of its proper divisors (1011323075).

1930121949 is an frugal number, since it uses more digits than its factorization.

1930121949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19184 (or 9597 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 1930121949 is about 43933.1531875416. The cubic root of 1930121949 is about 1245.0732899872.

The spelling of 1930121949 in words is "one billion, nine hundred thirty million, one hundred twenty-one thousand, nine hundred forty-nine".