1972169 has 2 divisors, whose sum is σ = 1972170. Its totient is φ = 1972168.

The previous prime is 1972147. The next prime is 1972177. The reversal of 1972169 is 9612791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1923769 + 48400 = 1387^2 + 220^2 .

It is an emirp because it is prime and its reverse (9612791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1972169 is a prime.

It is a super-2 number, since 2×1972169² = 7778901129122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1972129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986084 + 986085.

It is an arithmetic number, because the mean of its divisors is an integer number (986085).

2^1972169 is an apocalyptic number.

It is an amenable number.

1972169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1972169 is an equidigital number, since it uses as much as digits as its factorization.

1972169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 35.

The square root of 1972169 is about 1404.3393464544. The cubic root of 1972169 is about 125.4049586512.

The spelling of 1972169 in words is "one million, nine hundred seventy-two thousand, one hundred sixty-nine".