994961381 has 4 divisors (see below), whose sum is σ = 995690592. Its totient is φ = 994232172.

The previous prime is 994961369. The next prime is 994961389. The reversal of 994961381 is 183169499.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 183169499 = 37 ⋅4950527.

It is a cyclic number.

It is not a de Polignac number, because 994961381 - 2¹⁰ = 994960357 is a prime.

It is a super-2 number, since 2×994961381² = 1979896299362854322, 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 (994961389) 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, 362555 + ... + 365288.

It is an arithmetic number, because the mean of its divisors is an integer number (248922648).

Almost surely, 2^994961381 is an apocalyptic number.

It is an amenable number.

994961381 is a deficient number, since it is larger than the sum of its proper divisors (729211).

994961381 is a wasteful number, since it uses less digits than its factorization.

994961381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729210.

The product of its digits is 419904, while the sum is 50.

The square root of 994961381 is about 31543.0084329317. The cubic root of 994961381 is about 998.3176315570.

The spelling of 994961381 in words is "nine hundred ninety-four million, nine hundred sixty-one thousand, three hundred eighty-one".