149478877 has 2 divisors, whose sum is σ = 149478878. Its totient is φ = 149478876.

The previous prime is 149478851. The next prime is 149478881. The reversal of 149478877 is 778874941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145660761 + 3818116 = 12069^2 + 1954^2 .

It is a cyclic number.

It is not a de Polignac number, because 149478877 - 2¹¹ = 149476829 is a prime.

It is a super-2 number, since 2×149478877² = 44687869338362258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149478827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74739438 + 74739439.

It is an arithmetic number, because the mean of its divisors is an integer number (74739439).

Almost surely, 2^149478877 is an apocalyptic number.

It is an amenable number.

149478877 is a deficient number, since it is larger than the sum of its proper divisors (1).

149478877 is an equidigital number, since it uses as much as digits as its factorization.

149478877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3161088, while the sum is 55.

The square root of 149478877 is about 12226.1554464190. The cubic root of 149478877 is about 530.7132641881.

The spelling of 149478877 in words is "one hundred forty-nine million, four hundred seventy-eight thousand, eight hundred seventy-seven".