363619961 has 4 divisors (see below), whose sum is σ = 363977124. Its totient is φ = 363262800.

The previous prime is 363619937. The next prime is 363619981. The reversal of 363619961 is 169916363.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 169916363 = 31 ⋅5481173.

It can be written as a sum of positive squares in 2 ways, for example, as 300814336 + 62805625 = 17344^2 + 7925^2 .

It is a cyclic number.

It is not a de Polignac number, because 363619961 - 2¹⁴ = 363603577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (363619981) 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, 177050 + ... + 179091.

It is an arithmetic number, because the mean of its divisors is an integer number (90994281).

Almost surely, 2^363619961 is an apocalyptic number.

It is an amenable number.

363619961 is a deficient number, since it is larger than the sum of its proper divisors (357163).

363619961 is a wasteful number, since it uses less digits than its factorization.

363619961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357162.

The product of its digits is 157464, while the sum is 44.

The square root of 363619961 is about 19068.8216993080. The cubic root of 363619961 is about 713.7551233373.

The spelling of 363619961 in words is "three hundred sixty-three million, six hundred nineteen thousand, nine hundred sixty-one".