151791949 has 4 divisors (see below), whose sum is σ = 152460864. Its totient is φ = 151123036.

The previous prime is 151791919. The next prime is 151791961. The reversal of 151791949 is 949197151.

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, and also an emirpimes, since its reverse is a distinct semiprime: 949197151 = 7 ⋅135599593.

It is a cyclic number.

It is not a de Polignac number, because 151791949 - 2¹⁷ = 151660877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 151791899 and 151791908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151791919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334117 + ... + 334570.

It is an arithmetic number, because the mean of its divisors is an integer number (38115216).

Almost surely, 2^151791949 is an apocalyptic number.

It is an amenable number.

151791949 is a deficient number, since it is larger than the sum of its proper divisors (668915).

151791949 is an equidigital number, since it uses as much as digits as its factorization.

151791949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668914.

The product of its digits is 102060, while the sum is 46.

The square root of 151791949 is about 12320.3875344893. The cubic root of 151791949 is about 533.4367257449.

It can be divided in two parts, 151 and 791949, that added together give a square (792100 = 890²).

The spelling of 151791949 in words is "one hundred fifty-one million, seven hundred ninety-one thousand, nine hundred forty-nine".