161020487 has 2 divisors, whose sum is σ = 161020488. Its totient is φ = 161020486.

The previous prime is 161020471. The next prime is 161020507. The reversal of 161020487 is 784020161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161020487 - 2⁴ = 161020471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161020427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80510243 + 80510244.

It is an arithmetic number, because the mean of its divisors is an integer number (80510244).

Almost surely, 2^161020487 is an apocalyptic number.

161020487 is a deficient number, since it is larger than the sum of its proper divisors (1).

161020487 is an equidigital number, since it uses as much as digits as its factorization.

161020487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 161020487 is about 12689.3848156638. The cubic root of 161020487 is about 544.0352564646.

The spelling of 161020487 in words is "one hundred sixty-one million, twenty thousand, four hundred eighty-seven".