149917903 has 2 divisors, whose sum is σ = 149917904. Its totient is φ = 149917902.

The previous prime is 149917843. The next prime is 149917913. The reversal of 149917903 is 309719941.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149917903 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 149917903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149917913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74958951 + 74958952.

It is an arithmetic number, because the mean of its divisors is an integer number (74958952).

Almost surely, 2^149917903 is an apocalyptic number.

149917903 is a deficient number, since it is larger than the sum of its proper divisors (1).

149917903 is an equidigital number, since it uses as much as digits as its factorization.

149917903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 149917903 is about 12244.0966592068. The cubic root of 149917903 is about 531.2323323675.

The spelling of 149917903 in words is "one hundred forty-nine million, nine hundred seventeen thousand, nine hundred three".