149428381 has 2 divisors, whose sum is σ = 149428382. Its totient is φ = 149428380.

The previous prime is 149428379. The next prime is 149428423. The reversal of 149428381 is 183824941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81613156 + 67815225 = 9034^2 + 8235^2 .

It is a cyclic number.

It is not a de Polignac number, because 149428381 - 2¹ = 149428379 is a prime.

It is a super-2 number, since 2×149428381² = 44657682096562322, which contains 22 as substring.

Together with 149428379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149428781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74714190 + 74714191.

It is an arithmetic number, because the mean of its divisors is an integer number (74714191).

Almost surely, 2^149428381 is an apocalyptic number.

It is an amenable number.

149428381 is a deficient number, since it is larger than the sum of its proper divisors (1).

149428381 is an equidigital number, since it uses as much as digits as its factorization.

149428381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 40.

The square root of 149428381 is about 12224.0901910940. The cubic root of 149428381 is about 530.6534967352.

The spelling of 149428381 in words is "one hundred forty-nine million, four hundred twenty-eight thousand, three hundred eighty-one".