139484749 has 2 divisors, whose sum is σ = 139484750. Its totient is φ = 139484748.

The previous prime is 139484731. The next prime is 139484771. The reversal of 139484749 is 947484931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139476100 + 8649 = 11810^2 + 93^2 .

It is a cyclic number.

It is not a de Polignac number, because 139484749 - 2⁷ = 139484621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139484729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69742374 + 69742375.

It is an arithmetic number, because the mean of its divisors is an integer number (69742375).

Almost surely, 2^139484749 is an apocalyptic number.

It is an amenable number.

139484749 is a deficient number, since it is larger than the sum of its proper divisors (1).

139484749 is an equidigital number, since it uses as much as digits as its factorization.

139484749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 49.

The square root of 139484749 is about 11810.3661670585. The cubic root of 139484749 is about 518.6116181134.

The spelling of 139484749 in words is "one hundred thirty-nine million, four hundred eighty-four thousand, seven hundred forty-nine".