149381693 has 2 divisors, whose sum is σ = 149381694. Its totient is φ = 149381692.

The previous prime is 149381689. The next prime is 149381731. The reversal of 149381693 is 396183941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144528484 + 4853209 = 12022^2 + 2203^2 .

It is a cyclic number.

It is not a de Polignac number, because 149381693 - 2² = 149381689 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149381623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74690846 + 74690847.

It is an arithmetic number, because the mean of its divisors is an integer number (74690847).

Almost surely, 2^149381693 is an apocalyptic number.

It is an amenable number.

149381693 is a deficient number, since it is larger than the sum of its proper divisors (1).

149381693 is an equidigital number, since it uses as much as digits as its factorization.

149381693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 44.

The square root of 149381693 is about 12222.1803701304. The cubic root of 149381693 is about 530.5982244792.

The spelling of 149381693 in words is "one hundred forty-nine million, three hundred eighty-one thousand, six hundred ninety-three".