161408747 has 2 divisors, whose sum is σ = 161408748. Its totient is φ = 161408746.

The previous prime is 161408729. The next prime is 161408749. The reversal of 161408747 is 747804161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161408747 - 2⁶ = 161408683 is a prime.

It is a super-2 number, since 2×161408747² = 52105567216220018, which contains 22 as substring.

Together with 161408749, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161408747.

It is not a weakly prime, because it can be changed into another prime (161408749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80704373 + 80704374.

It is an arithmetic number, because the mean of its divisors is an integer number (80704374).

Almost surely, 2^161408747 is an apocalyptic number.

161408747 is a deficient number, since it is larger than the sum of its proper divisors (1).

161408747 is an equidigital number, since it uses as much as digits as its factorization.

161408747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 161408747 is about 12704.6742185701. The cubic root of 161408747 is about 544.4721730876.

The spelling of 161408747 in words is "one hundred sixty-one million, four hundred eight thousand, seven hundred forty-seven".