133489397 has 2 divisors, whose sum is σ = 133489398. Its totient is φ = 133489396.

The previous prime is 133489337. The next prime is 133489403. The reversal of 133489397 is 793984331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69072721 + 64416676 = 8311^2 + 8026^2 .

It is a cyclic number.

It is not a de Polignac number, because 133489397 - 2¹² = 133485301 is a prime.

It is a super-2 number, since 2×133489397² = 35638838222847218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133489337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66744698 + 66744699.

It is an arithmetic number, because the mean of its divisors is an integer number (66744699).

Almost surely, 2^133489397 is an apocalyptic number.

It is an amenable number.

133489397 is a deficient number, since it is larger than the sum of its proper divisors (1).

133489397 is an equidigital number, since it uses as much as digits as its factorization.

133489397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 47.

The square root of 133489397 is about 11553.7611624960. The cubic root of 133489397 is about 511.0721989787.

The spelling of 133489397 in words is "one hundred thirty-three million, four hundred eighty-nine thousand, three hundred ninety-seven".