149671801 has 2 divisors, whose sum is σ = 149671802. Its totient is φ = 149671800.

The previous prime is 149671729. The next prime is 149671807. The reversal of 149671801 is 108176941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147598201 + 2073600 = 12149^2 + 1440^2 .

It is a cyclic number.

It is not a de Polignac number, because 149671801 - 2⁹ = 149671289 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (149671807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74835900 + 74835901.

It is an arithmetic number, because the mean of its divisors is an integer number (74835901).

Almost surely, 2^149671801 is an apocalyptic number.

It is an amenable number.

149671801 is a deficient number, since it is larger than the sum of its proper divisors (1).

149671801 is an equidigital number, since it uses as much as digits as its factorization.

149671801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 149671801 is about 12234.0427087697. The cubic root of 149671801 is about 530.9414866430.

The spelling of 149671801 in words is "one hundred forty-nine million, six hundred seventy-one thousand, eight hundred one".