139772031 has 16 divisors (see below), whose sum is σ = 217519104. Its totient is φ = 78169824.

The previous prime is 139772029. The next prime is 139772041. The reversal of 139772031 is 130277931.

It is a happy number.

It is not a de Polignac number, because 139772031 - 2¹ = 139772029 is a prime.

It is a super-2 number, since 2×139772031² = 39072441299729922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 139771983 and 139772001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139772021) 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, 69820 + ... + 71793.

It is an arithmetic number, because the mean of its divisors is an integer number (13594944).

Almost surely, 2^139772031 is an apocalyptic number.

139772031 is a deficient number, since it is larger than the sum of its proper divisors (77747073).

139772031 is a wasteful number, since it uses less digits than its factorization.

139772031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141670.

The product of its (nonzero) digits is 7938, while the sum is 33.

The square root of 139772031 is about 11822.5221928318. The cubic root of 139772031 is about 518.9674171429.

The spelling of 139772031 in words is "one hundred thirty-nine million, seven hundred seventy-two thousand, thirty-one".