148437679921 has 2 divisors, whose sum is σ = 148437679922. Its totient is φ = 148437679920.

The previous prime is 148437679891. The next prime is 148437680009. The reversal of 148437679921 is 129976734841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95703609600 + 52734070321 = 309360^2 + 229639^2 .

It is a cyclic number.

It is not a de Polignac number, because 148437679921 - 2¹¹ = 148437677873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 148437679921.

It is not a weakly prime, because it can be changed into another prime (148437676921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74218839960 + 74218839961.

It is an arithmetic number, because the mean of its divisors is an integer number (74218839961).

Almost surely, 2^148437679921 is an apocalyptic number.

It is an amenable number.

148437679921 is a deficient number, since it is larger than the sum of its proper divisors (1).

148437679921 is an equidigital number, since it uses as much as digits as its factorization.

148437679921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18289152, while the sum is 61.

The spelling of 148437679921 in words is "one hundred forty-eight billion, four hundred thirty-seven million, six hundred seventy-nine thousand, nine hundred twenty-one".