149693801 has 2 divisors, whose sum is σ = 149693802. Its totient is φ = 149693800.

The previous prime is 149693777. The next prime is 149693807. The reversal of 149693801 is 108396941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77018176 + 72675625 = 8776^2 + 8525^2 .

It is an emirp because it is prime and its reverse (108396941) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149693801 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (149693807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74846900 + 74846901.

It is an arithmetic number, because the mean of its divisors is an integer number (74846901).

Almost surely, 2^149693801 is an apocalyptic number.

It is an amenable number.

149693801 is a deficient number, since it is larger than the sum of its proper divisors (1).

149693801 is an equidigital number, since it uses as much as digits as its factorization.

149693801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 149693801 is about 12234.9418061550. The cubic root of 149693801 is about 530.9674994265.

The spelling of 149693801 in words is "one hundred forty-nine million, six hundred ninety-three thousand, eight hundred one".