149903973 has 8 divisors (see below), whose sum is σ = 222080000. Its totient is φ = 99935964.

The previous prime is 149903959. The next prime is 149903989. The reversal of 149903973 is 379309941.

It is not a de Polignac number, because 149903973 - 2⁸ = 149903717 is a prime.

It is a super-2 number, since 2×149903973² = 44942402242369458, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149907973) 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, 2775973 + ... + 2776026.

It is an arithmetic number, because the mean of its divisors is an integer number (27760000).

Almost surely, 2^149903973 is an apocalyptic number.

It is an amenable number.

149903973 is a deficient number, since it is larger than the sum of its proper divisors (72176027).

149903973 is an equidigital number, since it uses as much as digits as its factorization.

149903973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5552008 (or 5552002 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The square root of 149903973 is about 12243.5278004340. The cubic root of 149903973 is about 531.2158782606.

The spelling of 149903973 in words is "one hundred forty-nine million, nine hundred three thousand, nine hundred seventy-three".