139484929 has 2 divisors, whose sum is σ = 139484930. Its totient is φ = 139484928.

The previous prime is 139484887. The next prime is 139484953. The reversal of 139484929 is 929484931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130484929 + 9000000 = 11423^2 + 3000^2 .

It is an emirp because it is prime and its reverse (929484931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139484929 - 2⁷ = 139484801 is a prime.

It is not a weakly prime, because it can be changed into another prime (139484959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69742464 + 69742465.

It is an arithmetic number, because the mean of its divisors is an integer number (69742465).

Almost surely, 2^139484929 is an apocalyptic number.

It is an amenable number.

139484929 is a deficient number, since it is larger than the sum of its proper divisors (1).

139484929 is an equidigital number, since it uses as much as digits as its factorization.

139484929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 49.

The square root of 139484929 is about 11810.3737874802. The cubic root of 139484929 is about 518.6118411965.

The spelling of 139484929 in words is "one hundred thirty-nine million, four hundred eighty-four thousand, nine hundred twenty-nine".