361891377 has 12 divisors (see below), whose sum is σ = 540757620. Its totient is φ = 232941408.

The previous prime is 361891357. The next prime is 361891403. The reversal of 361891377 is 773198163.

It can be written as a sum of positive squares in 2 ways, for example, as 291180096 + 70711281 = 17064^2 + 8409^2 .

It is not a de Polignac number, because 361891377 - 2²² = 357697073 is a prime.

It is a super-2 number, since 2×361891377² = 261930737493912258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (361891307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 693018 + ... + 693539.

It is an arithmetic number, because the mean of its divisors is an integer number (45063135).

Almost surely, 2^361891377 is an apocalyptic number.

It is an amenable number.

361891377 is a deficient number, since it is larger than the sum of its proper divisors (178866243).

361891377 is a wasteful number, since it uses less digits than its factorization.

361891377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386592 (or 1386589 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 361891377 is about 19023.4428272066. The cubic root of 361891377 is about 712.6223051355.

The spelling of 361891377 in words is "three hundred sixty-one million, eight hundred ninety-one thousand, three hundred seventy-seven".