43870387387 has 2 divisors, whose sum is σ = 43870387388. Its totient is φ = 43870387386.

The previous prime is 43870387339. The next prime is 43870387441. The reversal of 43870387387 is 78378307834.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43870387387 - 2¹⁹ = 43869863099 is a prime.

It is a super-2 number, since 2×43870387387² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43870384387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21935193693 + 21935193694.

It is an arithmetic number, because the mean of its divisors is an integer number (21935193694).

Almost surely, 2^43870387387 is an apocalyptic number.

43870387387 is a deficient number, since it is larger than the sum of its proper divisors (1).

43870387387 is an equidigital number, since it uses as much as digits as its factorization.

43870387387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18966528, while the sum is 58.

The spelling of 43870387387 in words is "forty-three billion, eight hundred seventy million, three hundred eighty-seven thousand, three hundred eighty-seven".