149220779 has 2 divisors, whose sum is σ = 149220780. Its totient is φ = 149220778.

The previous prime is 149220769. The next prime is 149220821. The reversal of 149220779 is 977022941.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149220779 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (149220719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74610389 + 74610390.

It is an arithmetic number, because the mean of its divisors is an integer number (74610390).

Almost surely, 2^149220779 is an apocalyptic number.

149220779 is a deficient number, since it is larger than the sum of its proper divisors (1).

149220779 is an equidigital number, since it uses as much as digits as its factorization.

149220779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 149220779 is about 12215.5957284121. The cubic root of 149220779 is about 530.4076358452.

The spelling of 149220779 in words is "one hundred forty-nine million, two hundred twenty thousand, seven hundred seventy-nine".