161432477 has 2 divisors, whose sum is σ = 161432478. Its totient is φ = 161432476.

The previous prime is 161432431. The next prime is 161432489. The reversal of 161432477 is 774234161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109390681 + 52041796 = 10459^2 + 7214^2 .

It is an emirp because it is prime and its reverse (774234161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161432477 - 2¹² = 161428381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161432177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80716238 + 80716239.

It is an arithmetic number, because the mean of its divisors is an integer number (80716239).

Almost surely, 2^161432477 is an apocalyptic number.

It is an amenable number.

161432477 is a deficient number, since it is larger than the sum of its proper divisors (1).

161432477 is an equidigital number, since it uses as much as digits as its factorization.

161432477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 35.

The square root of 161432477 is about 12705.6080924921. The cubic root of 161432477 is about 544.4988541933.

The spelling of 161432477 in words is "one hundred sixty-one million, four hundred thirty-two thousand, four hundred seventy-seven".