137820396673 has 4 divisors (see below), whose sum is σ = 137886058800. Its totient is φ = 137754734548.

The previous prime is 137820396643. The next prime is 137820396677. The reversal of 137820396673 is 376693028731.

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 a cyclic number.

It is not a de Polignac number, because 137820396673 - 2⁵ = 137820396641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137820396677) 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, 32827915 + ... + 32832112.

It is an arithmetic number, because the mean of its divisors is an integer number (34471514700).

Almost surely, 2^137820396673 is an apocalyptic number.

It is an amenable number.

137820396673 is a deficient number, since it is larger than the sum of its proper divisors (65662127).

137820396673 is an equidigital number, since it uses as much as digits as its factorization.

137820396673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65662126.

The product of its (nonzero) digits is 6858432, while the sum is 55.

The spelling of 137820396673 in words is "one hundred thirty-seven billion, eight hundred twenty million, three hundred ninety-six thousand, six hundred seventy-three".