955661381 has 4 divisors (see below), whose sum is σ = 960512652. Its totient is φ = 950810112.

The previous prime is 955661359. The next prime is 955661417. The reversal of 955661381 is 183166559.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 875272225 + 80389156 = 29585^2 + 8966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-955661381 is a prime.

It is a super-2 number, since 2×955661381² = 1826577350269654322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (955661351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2425340 + ... + 2425733.

It is an arithmetic number, because the mean of its divisors is an integer number (240128163).

Almost surely, 2^955661381 is an apocalyptic number.

It is an amenable number.

955661381 is a deficient number, since it is larger than the sum of its proper divisors (4851271).

955661381 is a wasteful number, since it uses less digits than its factorization.

955661381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4851270.

The product of its digits is 194400, while the sum is 44.

The square root of 955661381 is about 30913.7733219353. The cubic root of 955661381 is about 984.9964805289.

The spelling of 955661381 in words is "nine hundred fifty-five million, six hundred sixty-one thousand, three hundred eighty-one".