161448977 has 2 divisors, whose sum is σ = 161448978. Its totient is φ = 161448976.

The previous prime is 161448967. The next prime is 161448997. The reversal of 161448977 is 779844161.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160174336 + 1274641 = 12656^2 + 1129^2 .

It is a cyclic number.

It is not a de Polignac number, because 161448977 - 2⁶ = 161448913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161448907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80724488 + 80724489.

It is an arithmetic number, because the mean of its divisors is an integer number (80724489).

Almost surely, 2^161448977 is an apocalyptic number.

It is an amenable number.

161448977 is a deficient number, since it is larger than the sum of its proper divisors (1).

161448977 is an equidigital number, since it uses as much as digits as its factorization.

161448977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 47.

The square root of 161448977 is about 12706.2573954725. The cubic root of 161448977 is about 544.5174046221.

The spelling of 161448977 in words is "one hundred sixty-one million, four hundred forty-eight thousand, nine hundred seventy-seven".