133870973 has 2 divisors, whose sum is σ = 133870974. Its totient is φ = 133870972.

The previous prime is 133870967. The next prime is 133871021. The reversal of 133870973 is 379078331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88416409 + 45454564 = 9403^2 + 6742^2 .

It is an emirp because it is prime and its reverse (379078331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133870973 - 2¹⁰ = 133869949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133870973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133870273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66935486 + 66935487.

It is an arithmetic number, because the mean of its divisors is an integer number (66935487).

Almost surely, 2^133870973 is an apocalyptic number.

It is an amenable number.

133870973 is a deficient number, since it is larger than the sum of its proper divisors (1).

133870973 is an equidigital number, since it uses as much as digits as its factorization.

133870973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 133870973 is about 11570.2624430045. The cubic root of 133870973 is about 511.5586979596.

The spelling of 133870973 in words is "one hundred thirty-three million, eight hundred seventy thousand, nine hundred seventy-three".