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139031793 = 3215447977
BaseRepresentation
bin10000100100101…
…11010011110001
3100200121112202200
420102113103301
5241043004133
621443533413
73305515335
oct1022272361
9320545680
10139031793
117153070a
123a68a269
1322a5b744
14146717c5
15c314913
hex84974f1

139031793 has 6 divisors (see below), whose sum is σ = 200823714. Its totient is φ = 92687856.

The previous prime is 139031791. The next prime is 139031801. The reversal of 139031793 is 397130931.

It can be written as a sum of positive squares in only one way, i.e., 129686544 + 9345249 = 11388^2 + 3057^2 .

It is not a de Polignac number, because 139031793 - 21 = 139031791 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139031791) 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 5 ways as a sum of consecutive naturals, for example, 7723980 + ... + 7723997.

It is an arithmetic number, because the mean of its divisors is an integer number (33470619).

Almost surely, 2139031793 is an apocalyptic number.

It is an amenable number.

139031793 is a deficient number, since it is larger than the sum of its proper divisors (61791921).

139031793 is a wasteful number, since it uses less digits than its factorization.

139031793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15447983 (or 15447980 counting only the distinct ones).

The product of its (nonzero) digits is 15309, while the sum is 36.

The square root of 139031793 is about 11791.1743689931. The cubic root of 139031793 is about 518.0496379637.

The spelling of 139031793 in words is "one hundred thirty-nine million, thirty-one thousand, seven hundred ninety-three".

Divisors: 1 3 9 15447977 46343931 139031793