149947903 has 8 divisors (see below), whose sum is σ = 171517472. Its totient is φ = 128415456.

The previous prime is 149947901. The next prime is 149947957. The reversal of 149947903 is 309749941.

149947903 is a nontrivial binomial coefficient, being equal to C(17318, 2).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 149947903 - 2¹ = 149947901 is a prime.

It is a super-2 number, since 2×149947903² = 44968747228194818, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149947901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1 + ... + 17317.

It is an arithmetic number, because the mean of its divisors is an integer number (21439684).

Almost surely, 2^149947903 is an apocalyptic number.

149947903 is the 17317-th triangular number and also the 8659-th hexagonal number.

149947903 is the 5773-rd centered nonagonal number.

149947903 is a deficient number, since it is larger than the sum of its proper divisors (21569569).

149947903 is a wasteful number, since it uses less digits than its factorization.

149947903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18561.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 149947903 is about 12245.3216780940. The cubic root of 149947903 is about 531.2677648869.

The spelling of 149947903 in words is "one hundred forty-nine million, nine hundred forty-seven thousand, nine hundred three".