137550749 has 4 divisors (see below), whose sum is σ = 157200864. Its totient is φ = 117900636.

The previous prime is 137550739. The next prime is 137550767. The reversal of 137550749 is 947055731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 137550749 - 2²⁰ = 136502173 is a prime.

It is a super-2 number, since 2×137550749² = 37840417100922002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137550739) 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, 9825047 + ... + 9825060.

It is an arithmetic number, because the mean of its divisors is an integer number (39300216).

Almost surely, 2^137550749 is an apocalyptic number.

It is an amenable number.

137550749 is a deficient number, since it is larger than the sum of its proper divisors (19650115).

137550749 is an equidigital number, since it uses as much as digits as its factorization.

137550749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19650114.

The product of its (nonzero) digits is 132300, while the sum is 41.

The square root of 137550749 is about 11728.2031445571. The cubic root of 137550749 is about 516.2035495340.

The spelling of 137550749 in words is "one hundred thirty-seven million, five hundred fifty thousand, seven hundred forty-nine".