151043993 has 4 divisors (see below), whose sum is σ = 154556688. Its totient is φ = 147531300.

The previous prime is 151043989. The next prime is 151043999. The reversal of 151043993 is 399340151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 151043993 - 2² = 151043989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151043999) 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 in 3 ways as a sum of consecutive naturals, for example, 1756283 + ... + 1756368.

It is an arithmetic number, because the mean of its divisors is an integer number (38639172).

Almost surely, 2^151043993 is an apocalyptic number.

It is an amenable number.

151043993 is a deficient number, since it is larger than the sum of its proper divisors (3512695).

151043993 is an equidigital number, since it uses as much as digits as its factorization.

151043993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3512694.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 151043993 is about 12289.9956468666. The cubic root of 151043993 is about 532.5591114848.

The spelling of 151043993 in words is "one hundred fifty-one million, forty-three thousand, nine hundred ninety-three".