161670203 has 2 divisors, whose sum is σ = 161670204. Its totient is φ = 161670202.

The previous prime is 161670137. The next prime is 161670233. The reversal of 161670203 is 302076161.

161670203 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161670203 - 2²⁴ = 144892987 is a prime.

It is a super-2 number, since 2×161670203² = 52274509076122418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161670233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80835101 + 80835102.

It is an arithmetic number, because the mean of its divisors is an integer number (80835102).

Almost surely, 2^161670203 is an apocalyptic number.

161670203 is a deficient number, since it is larger than the sum of its proper divisors (1).

161670203 is an equidigital number, since it uses as much as digits as its factorization.

161670203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 161670203 is about 12714.9598111830. The cubic root of 161670203 is about 544.7660000413.

The spelling of 161670203 in words is "one hundred sixty-one million, six hundred seventy thousand, two hundred three".