136509972 has 24 divisors (see below), whose sum is σ = 318712800. Its totient is φ = 45476256.

The previous prime is 136509959. The next prime is 136509973. The reversal of 136509972 is 279905631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136509973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35479 + ... + 39137.

It is an arithmetic number, because the mean of its divisors is an integer number (13279700).

Almost surely, 2^136509972 is an apocalyptic number.

136509972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

136509972 is an abundant number, since it is smaller than the sum of its proper divisors (182202828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

136509972 is a wasteful number, since it uses less digits than its factorization.

136509972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6775 (or 6773 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 42.

The square root of 136509972 is about 11683.7481999571. The cubic root of 136509972 is about 514.8983014695.

The spelling of 136509972 in words is "one hundred thirty-six million, five hundred nine thousand, nine hundred seventy-two".