149780311 has 2 divisors, whose sum is σ = 149780312. Its totient is φ = 149780310.

The previous prime is 149780237. The next prime is 149780321. The reversal of 149780311 is 113087941.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149780311 is a prime.

It is equal to p_8432791 and since 149780311 and 8432791 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149780321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74890155 + 74890156.

It is an arithmetic number, because the mean of its divisors is an integer number (74890156).

Almost surely, 2^149780311 is an apocalyptic number.

149780311 is a deficient number, since it is larger than the sum of its proper divisors (1).

149780311 is an equidigital number, since it uses as much as digits as its factorization.

149780311 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 149780311 is about 12238.4766617419. The cubic root of 149780311 is about 531.0697640767.

The spelling of 149780311 in words is "one hundred forty-nine million, seven hundred eighty thousand, three hundred eleven".