133206697 has 16 divisors (see below), whose sum is σ = 148321600. Its totient is φ = 118832832.

The previous prime is 133206691. The next prime is 133206709. The reversal of 133206697 is 796602331.

It is a cyclic number.

It is not a de Polignac number, because 133206697 - 2⁷ = 133206569 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133206691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77554 + ... + 79252.

It is an arithmetic number, because the mean of its divisors is an integer number (9270100).

Almost surely, 2^133206697 is an apocalyptic number.

133206697 is the 6664-th hex number.

It is an amenable number.

133206697 is a deficient number, since it is larger than the sum of its proper divisors (15114903).

133206697 is a wasteful number, since it uses less digits than its factorization.

133206697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 133206697 is about 11541.5205670657. The cubic root of 133206697 is about 510.7111660028.

It can be divided in two parts, 133206 and 697, that added together give a triangular number (133903 = T₅₁₇).

The spelling of 133206697 in words is "one hundred thirty-three million, two hundred six thousand, six hundred ninety-seven".