149981479 has 2 divisors, whose sum is σ = 149981480. Its totient is φ = 149981478.

The previous prime is 149981477. The next prime is 149981501. The reversal of 149981479 is 974189941.

It is a weak prime.

It is an emirp because it is prime and its reverse (974189941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149981479 - 2¹ = 149981477 is a prime.

Together with 149981477, 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 (149981471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74990739 + 74990740.

It is an arithmetic number, because the mean of its divisors is an integer number (74990740).

Almost surely, 2^149981479 is an apocalyptic number.

149981479 is a deficient number, since it is larger than the sum of its proper divisors (1).

149981479 is an equidigital number, since it uses as much as digits as its factorization.

149981479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 52.

The square root of 149981479 is about 12246.6925739156. The cubic root of 149981479 is about 531.3074153586.

The spelling of 149981479 in words is "one hundred forty-nine million, nine hundred eighty-one thousand, four hundred seventy-nine".