356599421 has 4 divisors (see below), whose sum is σ = 356709312. Its totient is φ = 356489532.

The previous prime is 356599403. The next prime is 356599447. The reversal of 356599421 is 124995653.

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: 124995653 = 149 ⋅838897.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-356599421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (356599471) 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, 49925 + ... + 56618.

It is an arithmetic number, because the mean of its divisors is an integer number (89177328).

Almost surely, 2^356599421 is an apocalyptic number.

It is an amenable number.

356599421 is a deficient number, since it is larger than the sum of its proper divisors (109891).

356599421 is a wasteful number, since it uses less digits than its factorization.

356599421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109890.

The product of its digits is 291600, while the sum is 44.

The square root of 356599421 is about 18883.8402079662. The cubic root of 356599421 is about 709.1316641006.

The spelling of 356599421 in words is "three hundred fifty-six million, five hundred ninety-nine thousand, four hundred twenty-one".