162991039 has 4 divisors (see below), whose sum is σ = 163255824. Its totient is φ = 162726256.

The previous prime is 162991021. The next prime is 162991051. The reversal of 162991039 is 930199261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 162991039 - 2¹³ = 162982847 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 162990992 and 162991010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162991739) 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, 131467 + ... + 132700.

It is an arithmetic number, because the mean of its divisors is an integer number (40813956).

Almost surely, 2^162991039 is an apocalyptic number.

162991039 is a deficient number, since it is larger than the sum of its proper divisors (264785).

162991039 is an equidigital number, since it uses as much as digits as its factorization.

162991039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264784.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 162991039 is about 12766.7943901357. The cubic root of 162991039 is about 546.2455467278.

The spelling of 162991039 in words is "one hundred sixty-two million, nine hundred ninety-one thousand, thirty-nine".