137533673 has 4 divisors (see below), whose sum is σ = 137887620. Its totient is φ = 137179728.

The previous prime is 137533657. The next prime is 137533691. The reversal of 137533673 is 376335731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 376335731 = 1277 ⋅294703.

It can be written as a sum of positive squares in 2 ways, for example, as 19963024 + 117570649 = 4468^2 + 10843^2 .

It is a cyclic number.

It is not a de Polignac number, because 137533673 - 2⁴ = 137533657 is a prime.

It is a super-2 number, since 2×137533673² = 37831022417741858, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (137533373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176390 + ... + 177167.

It is an arithmetic number, because the mean of its divisors is an integer number (34471905).

Almost surely, 2^137533673 is an apocalyptic number.

It is an amenable number.

137533673 is a deficient number, since it is larger than the sum of its proper divisors (353947).

137533673 is an equidigital number, since it uses as much as digits as its factorization.

137533673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353946.

The product of its digits is 119070, while the sum is 38.

The square root of 137533673 is about 11727.4751332075. The cubic root of 137533673 is about 516.1821875842.

The spelling of 137533673 in words is "one hundred thirty-seven million, five hundred thirty-three thousand, six hundred seventy-three".