11748439421 has 2 divisors, whose sum is σ = 11748439422. Its totient is φ = 11748439420.

The previous prime is 11748439411. The next prime is 11748439517. The reversal of 11748439421 is 12493484711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8658302500 + 3090136921 = 93050^2 + 55589^2 .

It is a cyclic number.

It is not a de Polignac number, because 11748439421 - 2⁶ = 11748439357 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11748439411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5874219710 + 5874219711.

It is an arithmetic number, because the mean of its divisors is an integer number (5874219711).

Almost surely, 2^11748439421 is an apocalyptic number.

It is an amenable number.

11748439421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11748439421 is an equidigital number, since it uses as much as digits as its factorization.

11748439421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 44.

The spelling of 11748439421 in words is "eleven billion, seven hundred forty-eight million, four hundred thirty-nine thousand, four hundred twenty-one".