161226787 has 2 divisors, whose sum is σ = 161226788. Its totient is φ = 161226786.

The previous prime is 161226743. The next prime is 161226811. The reversal of 161226787 is 787622161.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161226787 is a prime.

It is equal to p_9039496 and since 161226787 and 9039496 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (161226727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80613393 + 80613394.

It is an arithmetic number, because the mean of its divisors is an integer number (80613394).

Almost surely, 2^161226787 is an apocalyptic number.

161226787 is a deficient number, since it is larger than the sum of its proper divisors (1).

161226787 is an equidigital number, since it uses as much as digits as its factorization.

161226787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 40.

The square root of 161226787 is about 12697.5110553210. The cubic root of 161226787 is about 544.2674972556.

The spelling of 161226787 in words is "one hundred sixty-one million, two hundred twenty-six thousand, seven hundred eighty-seven".