139751401 has 2 divisors, whose sum is σ = 139751402. Its totient is φ = 139751400.

The previous prime is 139751399. The next prime is 139751483. The reversal of 139751401 is 104157931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82355625 + 57395776 = 9075^2 + 7576^2 .

It is an emirp because it is prime and its reverse (104157931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139751401 - 2¹ = 139751399 is a prime.

Together with 139751399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (139752401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69875700 + 69875701.

It is an arithmetic number, because the mean of its divisors is an integer number (69875701).

Almost surely, 2^139751401 is an apocalyptic number.

It is an amenable number.

139751401 is a deficient number, since it is larger than the sum of its proper divisors (1).

139751401 is an equidigital number, since it uses as much as digits as its factorization.

139751401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 139751401 is about 11821.6496733747. The cubic root of 139751401 is about 518.9418831250.

It can be divided in two parts, 13975 and 1401, that added together give a square (15376 = 124²).

The spelling of 139751401 in words is "one hundred thirty-nine million, seven hundred fifty-one thousand, four hundred one".