1621317107 has 8 divisors (see below), whose sum is σ = 1673708784. Its totient is φ = 1569593088.

The previous prime is 1621317091. The next prime is 1621317133. The reversal of 1621317107 is 7017131261.

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

It is a cyclic number.

It is not a de Polignac number, because 1621317107 - 2⁴ = 1621317091 is a prime.

It is a super-2 number, since 2×1621317107² = 5257338322901698898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1621317107.

It is not an unprimeable number, because it can be changed into a prime (1621317167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161978 + ... + 171695.

It is an arithmetic number, because the mean of its divisors is an integer number (209213598).

Almost surely, 2^1621317107 is an apocalyptic number.

1621317107 is a deficient number, since it is larger than the sum of its proper divisors (52391677).

1621317107 is a wasteful number, since it uses less digits than its factorization.

1621317107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333829.

The product of its (nonzero) digits is 1764, while the sum is 29.

The square root of 1621317107 is about 40265.5821639275. The cubic root of 1621317107 is about 1174.7784962271.

Adding to 1621317107 its reverse (7017131261), we get a palindrome (8638448368).

The spelling of 1621317107 in words is "one billion, six hundred twenty-one million, three hundred seventeen thousand, one hundred seven".