139303749 has 16 divisors (see below), whose sum is σ = 201083904. Its totient is φ = 85272000.

The previous prime is 139303721. The next prime is 139303757. The reversal of 139303749 is 947303931.

It is not a de Polignac number, because 139303749 - 2⁹ = 139303237 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139303799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1902 + ... + 16799.

It is an arithmetic number, because the mean of its divisors is an integer number (12567744).

Almost surely, 2^139303749 is an apocalyptic number.

It is an amenable number.

139303749 is a deficient number, since it is larger than the sum of its proper divisors (61780155).

139303749 is a wasteful number, since it uses less digits than its factorization.

139303749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18908.

The product of its (nonzero) digits is 61236, while the sum is 39.

The square root of 139303749 is about 11802.7009197048. The cubic root of 139303749 is about 518.3871985139.

The spelling of 139303749 in words is "one hundred thirty-nine million, three hundred three thousand, seven hundred forty-nine".