161654407 has 2 divisors, whose sum is σ = 161654408. Its totient is φ = 161654406.

The previous prime is 161654371. The next prime is 161654417. The reversal of 161654407 is 704456161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161654407 - 2⁷ = 161654279 is a prime.

It is a super-2 number, since 2×161654407² = 52264294605043298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161654417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80827203 + 80827204.

It is an arithmetic number, because the mean of its divisors is an integer number (80827204).

Almost surely, 2^161654407 is an apocalyptic number.

161654407 is a deficient number, since it is larger than the sum of its proper divisors (1).

161654407 is an equidigital number, since it uses as much as digits as its factorization.

161654407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 161654407 is about 12714.3386379316. The cubic root of 161654407 is about 544.7482573283.

The spelling of 161654407 in words is "one hundred sixty-one million, six hundred fifty-four thousand, four hundred seven".