160990621 has 6 divisors (see below), whose sum is σ = 176956766. Its totient is φ = 146355000.

The previous prime is 160990619. The next prime is 160990637. The reversal of 160990621 is 126099061.

It can be written as a sum of positive squares in only one way, i.e., 83356900 + 77633721 = 9130^2 + 8811^2 .

It is not a de Polignac number, because 160990621 - 2¹ = 160990619 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 (160990681) 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 5 ways as a sum of consecutive naturals, for example, 665130 + ... + 665371.

Almost surely, 2^160990621 is an apocalyptic number.

160990621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

160990621 is a deficient number, since it is larger than the sum of its proper divisors (15966145).

160990621 is a wasteful number, since it uses less digits than its factorization.

160990621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330523 (or 1330512 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 160990621 is about 12688.2079506919. The cubic root of 160990621 is about 544.0016185884.

The spelling of 160990621 in words is "one hundred sixty million, nine hundred ninety thousand, six hundred twenty-one".