161403767 has 4 divisors (see below), whose sum is σ = 184461456. Its totient is φ = 138346080.

The previous prime is 161403761. The next prime is 161403769. The reversal of 161403767 is 767304161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161403767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161403761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11528834 + ... + 11528847.

It is an arithmetic number, because the mean of its divisors is an integer number (46115364).

Almost surely, 2^161403767 is an apocalyptic number.

161403767 is a deficient number, since it is larger than the sum of its proper divisors (23057689).

161403767 is an equidigital number, since it uses as much as digits as its factorization.

161403767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23057688.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 161403767 is about 12704.4782262004. The cubic root of 161403767 is about 544.4665734338.

The spelling of 161403767 in words is "one hundred sixty-one million, four hundred three thousand, seven hundred sixty-seven".