361621439 has 4 divisors (see below), whose sum is σ = 364382040. Its totient is φ = 358860840.

The previous prime is 361621409. The next prime is 361621493. The reversal of 361621439 is 934126163.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 361621439 - 2¹² = 361617343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 361621399 and 361621408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (361621409) 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, 1380104 + ... + 1380365.

It is an arithmetic number, because the mean of its divisors is an integer number (91095510).

Almost surely, 2^361621439 is an apocalyptic number.

361621439 is a deficient number, since it is larger than the sum of its proper divisors (2760601).

361621439 is a wasteful number, since it uses less digits than its factorization.

361621439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2760600.

The product of its digits is 23328, while the sum is 35.

The square root of 361621439 is about 19016.3466259952. The cubic root of 361621439 is about 712.4450772889.

The spelling of 361621439 in words is "three hundred sixty-one million, six hundred twenty-one thousand, four hundred thirty-nine".