139228783 has 2 divisors, whose sum is σ = 139228784. Its totient is φ = 139228782.

The previous prime is 139228763. The next prime is 139228801. The reversal of 139228783 is 387822931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139228783 - 2¹³ = 139220591 is a prime.

It is a super-2 number, since 2×139228783² = 38769308031322178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139228723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69614391 + 69614392.

It is an arithmetic number, because the mean of its divisors is an integer number (69614392).

Almost surely, 2^139228783 is an apocalyptic number.

139228783 is a deficient number, since it is larger than the sum of its proper divisors (1).

139228783 is an equidigital number, since it uses as much as digits as its factorization.

139228783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 139228783 is about 11799.5246938171. The cubic root of 139228783 is about 518.2941921922.

The spelling of 139228783 in words is "one hundred thirty-nine million, two hundred twenty-eight thousand, seven hundred eighty-three".