133643870 has 8 divisors (see below), whose sum is σ = 240558984. Its totient is φ = 53457544.

The previous prime is 133643843. The next prime is 133643897. The reversal of 133643870 is 78346331.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (133643843) and next prime (133643897).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 133643870.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6682184 + ... + 6682203.

It is an arithmetic number, because the mean of its divisors is an integer number (30069873).

Almost surely, 2^133643870 is an apocalyptic number.

133643870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133643870 is a deficient number, since it is larger than the sum of its proper divisors (106915114).

133643870 is a wasteful number, since it uses less digits than its factorization.

133643870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13364394.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 133643870 is about 11560.4441956181. Note that the first 3 decimals coincide. The cubic root of 133643870 is about 511.2692593817.

The spelling of 133643870 in words is "one hundred thirty-three million, six hundred forty-three thousand, eight hundred seventy".