137003721 has 8 divisors (see below), whose sum is σ = 182726880. Its totient is φ = 91308192.

The previous prime is 137003707. The next prime is 137003729. The reversal of 137003721 is 127300731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 137003721 - 2¹⁴ = 136987337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 137003691 and 137003700.

It is not an unprimeable number, because it can be changed into a prime (137003729) 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, 12285 + ... + 20613.

It is an arithmetic number, because the mean of its divisors is an integer number (22840860).

Almost surely, 2^137003721 is an apocalyptic number.

It is an amenable number.

137003721 is a deficient number, since it is larger than the sum of its proper divisors (45723159).

137003721 is an equidigital number, since it uses as much as digits as its factorization.

137003721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13815.

The product of its (nonzero) digits is 882, while the sum is 24.

The square root of 137003721 is about 11704.8588628825. The cubic root of 137003721 is about 515.5183407228.

The spelling of 137003721 in words is "one hundred thirty-seven million, three thousand, seven hundred twenty-one".