169137947 has 16 divisors (see below), whose sum is σ = 202111200. Its totient is φ = 139722240.

The previous prime is 169137919. The next prime is 169137971. The reversal of 169137947 is 749731961.

169137947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 169137947 - 2²⁴ = 152360731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169137907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10172 + ... + 21017.

It is an arithmetic number, because the mean of its divisors is an integer number (12631950).

Almost surely, 2^169137947 is an apocalyptic number.

169137947 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

169137947 is a deficient number, since it is larger than the sum of its proper divisors (32973253).

169137947 is a wasteful number, since it uses less digits than its factorization.

169137947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31246.

The product of its digits is 285768, while the sum is 47.

The square root of 169137947 is about 13005.3045715969. The cubic root of 169137947 is about 553.0278700228.

The spelling of 169137947 in words is "one hundred sixty-nine million, one hundred thirty-seven thousand, nine hundred forty-seven".