137619421 has 2 divisors, whose sum is σ = 137619422. Its totient is φ = 137619420.

The previous prime is 137619409. The next prime is 137619457. The reversal of 137619421 is 124916731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77246521 + 60372900 = 8789^2 + 7770^2 .

It is a cyclic number.

It is not a de Polignac number, because 137619421 - 2⁵ = 137619389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137619481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68809710 + 68809711.

It is an arithmetic number, because the mean of its divisors is an integer number (68809711).

Almost surely, 2^137619421 is an apocalyptic number.

It is an amenable number.

137619421 is a deficient number, since it is larger than the sum of its proper divisors (1).

137619421 is an equidigital number, since it uses as much as digits as its factorization.

137619421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 34.

The square root of 137619421 is about 11731.1304229388. The cubic root of 137619421 is about 516.2894398516.

The spelling of 137619421 in words is "one hundred thirty-seven million, six hundred nineteen thousand, four hundred twenty-one".