161670037 has 2 divisors, whose sum is σ = 161670038. Its totient is φ = 161670036.

The previous prime is 161670007. The next prime is 161670043. The reversal of 161670037 is 730076161.

161670037 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 can be written as a sum of positive squares in only one way, i.e., 126315121 + 35354916 = 11239^2 + 5946^2 .

It is an emirp because it is prime and its reverse (730076161) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161670037 is a prime.

It is a super-2 number, since 2×161670037² = 52274401727162738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161669990 and 161670008.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161670007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80835018 + 80835019.

It is an arithmetic number, because the mean of its divisors is an integer number (80835019).

Almost surely, 2^161670037 is an apocalyptic number.

It is an amenable number.

161670037 is a deficient number, since it is larger than the sum of its proper divisors (1).

161670037 is an equidigital number, since it uses as much as digits as its factorization.

161670037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 161670037 is about 12714.9532834376. The cubic root of 161670037 is about 544.7658135893.

The spelling of 161670037 in words is "one hundred sixty-one million, six hundred seventy thousand, thirty-seven".