43420351087 has 2 divisors, whose sum is σ = 43420351088. Its totient is φ = 43420351086.

The previous prime is 43420351043. The next prime is 43420351099. The reversal of 43420351087 is 78015302434.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43420351087 - 2¹⁹ = 43419826799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43420351687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21710175543 + 21710175544.

It is an arithmetic number, because the mean of its divisors is an integer number (21710175544).

Almost surely, 2^43420351087 is an apocalyptic number.

43420351087 is a deficient number, since it is larger than the sum of its proper divisors (1).

43420351087 is an equidigital number, since it uses as much as digits as its factorization.

43420351087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 37.

The spelling of 43420351087 in words is "forty-three billion, four hundred twenty million, three hundred fifty-one thousand, eighty-seven".