139186492 has 6 divisors (see below), whose sum is σ = 243576368. Its totient is φ = 69593244.

The previous prime is 139186469. The next prime is 139186499. The reversal of 139186492 is 294681931.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139186499) 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 as a sum of consecutive naturals, namely, 17398308 + ... + 17398315.

Almost surely, 2^139186492 is an apocalyptic number.

It is an amenable number.

139186492 is a deficient number, since it is larger than the sum of its proper divisors (104389876).

139186492 is a wasteful number, since it uses less digits than its factorization.

139186492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34796627 (or 34796625 counting only the distinct ones).

The product of its digits is 93312, while the sum is 43.

The square root of 139186492 is about 11797.7324940007. The cubic root of 139186492 is about 518.2417092718.

The spelling of 139186492 in words is "one hundred thirty-nine million, one hundred eighty-six thousand, four hundred ninety-two".