136991452 has 24 divisors (see below), whose sum is σ = 258503616. Its totient is φ = 63146688.

The previous prime is 136991431. The next prime is 136991453. The reversal of 136991452 is 254199631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136991453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65373 + ... + 67435.

It is an arithmetic number, because the mean of its divisors is an integer number (10770984).

Almost surely, 2^136991452 is an apocalyptic number.

It is an amenable number.

136991452 is a deficient number, since it is larger than the sum of its proper divisors (121512164).

136991452 is a wasteful number, since it uses less digits than its factorization.

136991452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3357 (or 3355 counting only the distinct ones).

The product of its digits is 58320, while the sum is 40.

The square root of 136991452 is about 11704.3347525607. The cubic root of 136991452 is about 515.5029516436.

It can be divided in two parts, 13699 and 1452, that added together give a palindrome (15151).

The spelling of 136991452 in words is "one hundred thirty-six million, nine hundred ninety-one thousand, four hundred fifty-two".