133612397 has 2 divisors, whose sum is σ = 133612398. Its totient is φ = 133612396.

The previous prime is 133612343. The next prime is 133612429. The reversal of 133612397 is 793216331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104571076 + 29041321 = 10226^2 + 5389^2 .

It is a cyclic number.

It is not a de Polignac number, because 133612397 - 2¹² = 133608301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133612327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66806198 + 66806199.

It is an arithmetic number, because the mean of its divisors is an integer number (66806199).

Almost surely, 2^133612397 is an apocalyptic number.

It is an amenable number.

133612397 is a deficient number, since it is larger than the sum of its proper divisors (1).

133612397 is an equidigital number, since it uses as much as digits as its factorization.

133612397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20412, while the sum is 35.

The square root of 133612397 is about 11559.0828788447. The cubic root of 133612397 is about 511.2291217614.

The spelling of 133612397 in words is "one hundred thirty-three million, six hundred twelve thousand, three hundred ninety-seven".