170623420437 has 32 divisors (see below), whose sum is σ = 240471147520. Its totient is φ = 107312999040.

The previous prime is 170623420421. The next prime is 170623420439. The reversal of 170623420437 is 734024326071.

It is a happy number.

It is not a de Polignac number, because 170623420437 - 2⁴ = 170623420421 is a prime.

It is a super-2 number, since 2×170623420437² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 170623420395 and 170623420404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170623420439) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20887728 + ... + 20895894.

It is an arithmetic number, because the mean of its divisors is an integer number (7514723360).

Almost surely, 2^170623420437 is an apocalyptic number.

It is an amenable number.

170623420437 is a deficient number, since it is larger than the sum of its proper divisors (69847727083).

170623420437 is a wasteful number, since it uses less digits than its factorization.

170623420437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9673.

The product of its (nonzero) digits is 169344, while the sum is 39.

The spelling of 170623420437 in words is "one hundred seventy billion, six hundred twenty-three million, four hundred twenty thousand, four hundred thirty-seven".