137420819 has 8 divisors (see below), whose sum is σ = 142718400. Its totient is φ = 132218856.

The previous prime is 137420813. The next prime is 137420831. The reversal of 137420819 is 918024731.

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

It is a cyclic number.

It is not a de Polignac number, because 137420819 - 2²⁴ = 120643603 is a prime.

It is a super-2 number, since 2×137420819² = 37768962989261522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137420813) 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, 20969 + ... + 26730.

It is an arithmetic number, because the mean of its divisors is an integer number (17839800).

Almost surely, 2^137420819 is an apocalyptic number.

137420819 is a deficient number, since it is larger than the sum of its proper divisors (5297581).

137420819 is an equidigital number, since it uses as much as digits as its factorization.

137420819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47809.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 137420819 is about 11722.6626241652. The cubic root of 137420819 is about 516.0409635869.

The spelling of 137420819 in words is "one hundred thirty-seven million, four hundred twenty thousand, eight hundred nineteen".