377561 has 2 divisors, whose sum is σ = 377562. Its totient is φ = 377560.

The previous prime is 377557. The next prime is 377563. The reversal of 377561 is 165773.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 337561 + 40000 = 581^2 + 200^2 .

It is a cyclic number.

It is not a de Polignac number, because 377561 - 2² = 377557 is a prime.

Together with 377563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (377563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 188780 + 188781.

It is an arithmetic number, because the mean of its divisors is an integer number (188781).

2³⁷⁷⁵⁶¹ is an apocalyptic number.

It is an amenable number.

377561 is a deficient number, since it is larger than the sum of its proper divisors (1).

377561 is an equidigital number, since it uses as much as digits as its factorization.

377561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4410, while the sum is 29.

The square root of 377561 is about 614.4599254630. The cubic root of 377561 is about 72.2762662767.

The spelling of 377561 in words is "three hundred seventy-seven thousand, five hundred sixty-one".