162779987 has 4 divisors (see below), whose sum is σ = 168393120. Its totient is φ = 157166856.

The previous prime is 162779971. The next prime is 162779989. The reversal of 162779987 is 789977261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789977261 = 89 ⋅8876149.

It is a cyclic number.

It is not a de Polignac number, because 162779987 - 2⁴ = 162779971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162779989) 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, 2806523 + ... + 2806580.

It is an arithmetic number, because the mean of its divisors is an integer number (42098280).

Almost surely, 2^162779987 is an apocalyptic number.

162779987 is a deficient number, since it is larger than the sum of its proper divisors (5613133).

162779987 is an equidigital number, since it uses as much as digits as its factorization.

162779987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5613132.

The product of its digits is 2667168, while the sum is 56.

The square root of 162779987 is about 12758.5260512333. The cubic root of 162779987 is about 546.0096727971.

The spelling of 162779987 in words is "one hundred sixty-two million, seven hundred seventy-nine thousand, nine hundred eighty-seven".