1620312347 has 8 divisors (see below), whose sum is σ = 1733313456. Its totient is φ = 1509276672.

The previous prime is 1620312301. The next prime is 1620312361. The reversal of 1620312347 is 7432130261.

It is a happy number.

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 1620312347 - 2⁸ = 1620312091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1620312847) 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, 489653 + ... + 492950.

It is an arithmetic number, because the mean of its divisors is an integer number (216664182).

Almost surely, 2^1620312347 is an apocalyptic number.

1620312347 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1620312347 is a deficient number, since it is larger than the sum of its proper divisors (113001109).

1620312347 is an equidigital number, since it uses as much as digits as its factorization.

1620312347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982717.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 1620312347 is about 40253.1035697870. The cubic root of 1620312347 is about 1174.5357688064.

The spelling of 1620312347 in words is "one billion, six hundred twenty million, three hundred twelve thousand, three hundred forty-seven".