137942887 has 2 divisors, whose sum is σ = 137942888. Its totient is φ = 137942886.

The previous prime is 137942881. The next prime is 137942897. The reversal of 137942887 is 788249731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 137942887 - 2⁷ = 137942759 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 137942887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137942881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68971443 + 68971444.

It is an arithmetic number, because the mean of its divisors is an integer number (68971444).

Almost surely, 2^137942887 is an apocalyptic number.

137942887 is a deficient number, since it is larger than the sum of its proper divisors (1).

137942887 is an equidigital number, since it uses as much as digits as its factorization.

137942887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 49.

The square root of 137942887 is about 11744.9089821931. The cubic root of 137942887 is about 516.6936255560.

The spelling of 137942887 in words is "one hundred thirty-seven million, nine hundred forty-two thousand, eight hundred eighty-seven".