139953361 has 2 divisors, whose sum is σ = 139953362. Its totient is φ = 139953360.

The previous prime is 139953349. The next prime is 139953379. The reversal of 139953361 is 163359931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128119761 + 11833600 = 11319^2 + 3440^2 .

It is a cyclic number.

It is not a de Polignac number, because 139953361 - 2¹⁵ = 139920593 is a prime.

It is not a weakly prime, because it can be changed into another prime (139953461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69976680 + 69976681.

It is an arithmetic number, because the mean of its divisors is an integer number (69976681).

Almost surely, 2^139953361 is an apocalyptic number.

It is an amenable number.

139953361 is a deficient number, since it is larger than the sum of its proper divisors (1).

139953361 is an equidigital number, since it uses as much as digits as its factorization.

139953361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65610, while the sum is 40.

The square root of 139953361 is about 11830.1885445668. The cubic root of 139953361 is about 519.1917436067.

The spelling of 139953361 in words is "one hundred thirty-nine million, nine hundred fifty-three thousand, three hundred sixty-one".