133999370 has 16 divisors (see below), whose sum is σ = 245750760. Its totient is φ = 52588224.

The previous prime is 133999339. The next prime is 133999409. The reversal of 133999370 is 73999331.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 92409769 + 41589601 = 9613^2 + 6449^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125885 + ... + 126944.

Almost surely, 2^133999370 is an apocalyptic number.

133999370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133999370 is a deficient number, since it is larger than the sum of its proper divisors (111751390).

133999370 is a wasteful number, since it uses less digits than its factorization.

133999370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252889.

The product of its (nonzero) digits is 137781, while the sum is 44.

The square root of 133999370 is about 11575.8096909028. The cubic root of 133999370 is about 511.7221927360.

The spelling of 133999370 in words is "one hundred thirty-three million, nine hundred ninety-nine thousand, three hundred seventy".