1620201847 has 8 divisors (see below), whose sum is σ = 1871463312. Its totient is φ = 1386268800.

The previous prime is 1620201829. The next prime is 1620201851. The reversal of 1620201847 is 7481020261.

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 1620201847 - 2¹¹ = 1620199799 is a prime.

It is a super-2 number, since 2×1620201847² = 5250108050044422818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620201827) 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, 4331904 + ... + 4332277.

It is an arithmetic number, because the mean of its divisors is an integer number (233932914).

Almost surely, 2^1620201847 is an apocalyptic number.

1620201847 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1620201847 is a deficient number, since it is larger than the sum of its proper divisors (251261465).

1620201847 is a wasteful number, since it uses less digits than its factorization.

1620201847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8664209.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 1620201847 is about 40251.7309814125. The cubic root of 1620201847 is about 1174.5090683675.

The spelling of 1620201847 in words is "one billion, six hundred twenty million, two hundred one thousand, eight hundred forty-seven".