137977783 has 4 divisors (see below), whose sum is σ = 138038920. Its totient is φ = 137916648.

The previous prime is 137977771. The next prime is 137977799. The reversal of 137977783 is 387779731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 137977783 - 2⁹ = 137977271 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 137977783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137977703) 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 in 3 ways as a sum of consecutive naturals, for example, 27048 + ... + 31741.

It is an arithmetic number, because the mean of its divisors is an integer number (34509730).

Almost surely, 2^137977783 is an apocalyptic number.

137977783 is a deficient number, since it is larger than the sum of its proper divisors (61137).

137977783 is an equidigital number, since it uses as much as digits as its factorization.

137977783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61136.

The product of its digits is 1555848, while the sum is 52.

The square root of 137977783 is about 11746.3944680910. The cubic root of 137977783 is about 516.7371919453.

The spelling of 137977783 in words is "one hundred thirty-seven million, nine hundred seventy-seven thousand, seven hundred eighty-three".