1621368149 has 8 divisors (see below), whose sum is σ = 1717096320. Its totient is φ = 1525679296.

The previous prime is 1621368139. The next prime is 1621368181. The reversal of 1621368149 is 9418631261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1621368149 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 (1621368109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143882 + ... + 154740.

It is an arithmetic number, because the mean of its divisors is an integer number (214637040).

Almost surely, 2^1621368149 is an apocalyptic number.

It is an amenable number.

1621368149 is a deficient number, since it is larger than the sum of its proper divisors (95728171).

1621368149 is a wasteful number, since it uses less digits than its factorization.

1621368149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19659.

The product of its digits is 62208, while the sum is 41.

The square root of 1621368149 is about 40266.2159756787. The cubic root of 1621368149 is about 1174.7908241495.

The spelling of 1621368149 in words is "one billion, six hundred twenty-one million, three hundred sixty-eight thousand, one hundred forty-nine".