133191477 has 6 divisors (see below), whose sum is σ = 192387702. Its totient is φ = 88794312.

The previous prime is 133191473. The next prime is 133191521. The reversal of 133191477 is 774191331.

It can be written as a sum of positive squares in only one way, i.e., 114190596 + 19000881 = 10686^2 + 4359^2 .

It is not a de Polignac number, because 133191477 - 2² = 133191473 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133191473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7399518 + ... + 7399535.

It is an arithmetic number, because the mean of its divisors is an integer number (32064617).

Almost surely, 2^133191477 is an apocalyptic number.

It is an amenable number.

133191477 is a deficient number, since it is larger than the sum of its proper divisors (59196225).

133191477 is a wasteful number, since it uses less digits than its factorization.

133191477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14799059 (or 14799056 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 133191477 is about 11540.8611897033. The cubic root of 133191477 is about 510.6917142280.

The spelling of 133191477 in words is "one hundred thirty-three million, one hundred ninety-one thousand, four hundred seventy-seven".