149170381 has 2 divisors, whose sum is σ = 149170382. Its totient is φ = 149170380.

The previous prime is 149170367. The next prime is 149170409. The reversal of 149170381 is 183071941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127464100 + 21706281 = 11290^2 + 4659^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149170381 is a prime.

It is a super-2 number, since 2×149170381² = 44503605135370322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149170321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74585190 + 74585191.

It is an arithmetic number, because the mean of its divisors is an integer number (74585191).

Almost surely, 2^149170381 is an apocalyptic number.

It is an amenable number.

149170381 is a deficient number, since it is larger than the sum of its proper divisors (1).

149170381 is an equidigital number, since it uses as much as digits as its factorization.

149170381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 149170381 is about 12213.5326994281. The cubic root of 149170381 is about 530.3479156235.

The spelling of 149170381 in words is "one hundred forty-nine million, one hundred seventy thousand, three hundred eighty-one".