149977447 has 2 divisors, whose sum is σ = 149977448. Its totient is φ = 149977446.

The previous prime is 149977427. The next prime is 149977463. The reversal of 149977447 is 744779941.

It is a strong prime.

It is an emirp because it is prime and its reverse (744779941) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149977447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 149977394 and 149977403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149977427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74988723 + 74988724.

It is an arithmetic number, because the mean of its divisors is an integer number (74988724).

Almost surely, 2^149977447 is an apocalyptic number.

149977447 is a deficient number, since it is larger than the sum of its proper divisors (1).

149977447 is an equidigital number, since it uses as much as digits as its factorization.

149977447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 52.

The square root of 149977447 is about 12246.5279569354. The cubic root of 149977447 is about 531.3026542136.

The spelling of 149977447 in words is "one hundred forty-nine million, nine hundred seventy-seven thousand, four hundred forty-seven".