1662159097 has 4 divisors (see below), whose sum is σ = 1663233700. Its totient is φ = 1661084496.

The previous prime is 1662159077. The next prime is 1662159113. The reversal of 1662159097 is 7909512661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7909512661 = 421 ⋅18787441.

It can be written as a sum of positive squares in 2 ways, for example, as 348531561 + 1313627536 = 18669^2 + 36244^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1662159097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1662159017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 534978 + ... + 538075.

It is an arithmetic number, because the mean of its divisors is an integer number (415808425).

Almost surely, 2^1662159097 is an apocalyptic number.

It is an amenable number.

1662159097 is a deficient number, since it is larger than the sum of its proper divisors (1074603).

1662159097 is a wasteful number, since it uses less digits than its factorization.

1662159097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074602.

The product of its (nonzero) digits is 204120, while the sum is 46.

The square root of 1662159097 is about 40769.5854406198. The cubic root of 1662159097 is about 1184.5612734936.

The spelling of 1662159097 in words is "one billion, six hundred sixty-two million, one hundred fifty-nine thousand, ninety-seven".