1601971199 has 8 divisors (see below), whose sum is σ = 1619328480. Its totient is φ = 1584631296.

The previous prime is 1601971193. The next prime is 1601971211. The reversal of 1601971199 is 9911791061.

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 1601971199 - 2¹⁶ = 1601905663 is a prime.

It is a super-3 number, since 3×1601971199³ (a number of 29 digits) contains 333 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 (1601971193) 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, 278747 + ... + 284435.

It is an arithmetic number, because the mean of its divisors is an integer number (202416060).

Almost surely, 2^1601971199 is an apocalyptic number.

1601971199 is a deficient number, since it is larger than the sum of its proper divisors (17357281).

1601971199 is an equidigital number, since it uses as much as digits as its factorization.

1601971199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8689.

The product of its (nonzero) digits is 30618, while the sum is 44.

The square root of 1601971199 is about 40024.6324030590. The cubic root of 1601971199 is about 1170.0872165728.

The spelling of 1601971199 in words is "one billion, six hundred one million, nine hundred seventy-one thousand, one hundred ninety-nine".