1948407749 has 2 divisors, whose sum is σ = 1948407750. Its totient is φ = 1948407748.

The previous prime is 1948407737. The next prime is 1948407793. The reversal of 1948407749 is 9477048491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1917826849 + 30580900 = 43793^2 + 5530^2 .

It is a cyclic number.

It is not a de Polignac number, because 1948407749 - 2⁴ = 1948407733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1948407749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1948407709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974203874 + 974203875.

It is an arithmetic number, because the mean of its divisors is an integer number (974203875).

Almost surely, 2^1948407749 is an apocalyptic number.

It is an amenable number.

1948407749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1948407749 is an equidigital number, since it uses as much as digits as its factorization.

1948407749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The square root of 1948407749 is about 44140.7719574545. The cubic root of 1948407749 is about 1248.9928418439.

The spelling of 1948407749 in words is "one billion, nine hundred forty-eight million, four hundred seven thousand, seven hundred forty-nine".