137944819 has 2 divisors, whose sum is σ = 137944820. Its totient is φ = 137944818.

The previous prime is 137944811. The next prime is 137944861. The reversal of 137944819 is 918449731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 137944819 - 2³ = 137944811 is a prime.

It is a super-2 number, since 2×137944819² = 38057546177885522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (137944811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68972409 + 68972410.

It is an arithmetic number, because the mean of its divisors is an integer number (68972410).

Almost surely, 2^137944819 is an apocalyptic number.

137944819 is a deficient number, since it is larger than the sum of its proper divisors (1).

137944819 is an equidigital number, since it uses as much as digits as its factorization.

137944819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 137944819 is about 11744.9912303075. The cubic root of 137944819 is about 516.6960377799.

The spelling of 137944819 in words is "one hundred thirty-seven million, nine hundred forty-four thousand, eight hundred nineteen".