1621004349 has 16 divisors (see below), whose sum is σ = 2305955520. Its totient is φ = 1009332480.

The previous prime is 1621004321. The next prime is 1621004351. The reversal of 1621004349 is 9434001261.

It is not a de Polignac number, because 1621004349 - 2¹² = 1621000253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621004309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114634 + ... + 127995.

It is an arithmetic number, because the mean of its divisors is an integer number (144122220).

Almost surely, 2^1621004349 is an apocalyptic number.

It is an amenable number.

1621004349 is a deficient number, since it is larger than the sum of its proper divisors (684951171).

1621004349 is a wasteful number, since it uses less digits than its factorization.

1621004349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242780.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 1621004349 is about 40261.6982875785. The cubic root of 1621004349 is about 1174.7029516797.

The spelling of 1621004349 in words is "one billion, six hundred twenty-one million, four thousand, three hundred forty-nine".