9015897421 has 2 divisors, whose sum is σ = 9015897422. Its totient is φ = 9015897420.

The previous prime is 9015897403. The next prime is 9015897467. The reversal of 9015897421 is 1247985109.

9015897421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (9015897467) can be obtained adding 9015897421 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5604169321 + 3411728100 = 74861^2 + 58410^2 .

It is a cyclic number.

It is not a de Polignac number, because 9015897421 - 2⁵ = 9015897389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9015897481) 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 as a sum of consecutive naturals, namely, 4507948710 + 4507948711.

It is an arithmetic number, because the mean of its divisors is an integer number (4507948711).

Almost surely, 2^9015897421 is an apocalyptic number.

It is an amenable number.

9015897421 is a deficient number, since it is larger than the sum of its proper divisors (1).

9015897421 is an equidigital number, since it uses as much as digits as its factorization.

9015897421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 46.

The square root of 9015897421 is about 94952.0796033452. The cubic root of 9015897421 is about 2081.3078422050.

The spelling of 9015897421 in words is "nine billion, fifteen million, eight hundred ninety-seven thousand, four hundred twenty-one".