161202049 has 2 divisors, whose sum is σ = 161202050. Its totient is φ = 161202048.

The previous prime is 161202047. The next prime is 161202059. The reversal of 161202049 is 940202161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157753600 + 3448449 = 12560^2 + 1857^2 .

It is a cyclic number.

It is not a de Polignac number, because 161202049 - 2¹ = 161202047 is a prime.

It is a super-2 number, since 2×161202049² = 51972201203596802, which contains 22 as substring.

Together with 161202047, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (161202043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80601024 + 80601025.

It is an arithmetic number, because the mean of its divisors is an integer number (80601025).

Almost surely, 2^161202049 is an apocalyptic number.

It is an amenable number.

161202049 is a deficient number, since it is larger than the sum of its proper divisors (1).

161202049 is an equidigital number, since it uses as much as digits as its factorization.

161202049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 161202049 is about 12696.5368900342. The cubic root of 161202049 is about 544.2396590816.

The spelling of 161202049 in words is "one hundred sixty-one million, two hundred two thousand, forty-nine".