151191493 has 6 divisors (see below), whose sum is σ = 159568134. Its totient is φ = 143233704.

The previous prime is 151191487. The next prime is 151191629. The reversal of 151191493 is 394191151.

It can be written as a sum of positive squares in only one way, i.e., 122279364 + 28912129 = 11058^2 + 5377^2 .

It is not a de Polignac number, because 151191493 - 2⁵ = 151191461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151191473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 209046 + ... + 209767.

It is an arithmetic number, because the mean of its divisors is an integer number (26594689).

Almost surely, 2^151191493 is an apocalyptic number.

It is an amenable number.

151191493 is a deficient number, since it is larger than the sum of its proper divisors (8376641).

151191493 is an equidigital number, since it uses as much as digits as its factorization.

151191493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418851 (or 418832 counting only the distinct ones).

The product of its digits is 4860, while the sum is 34.

The square root of 151191493 is about 12295.9949983724. The cubic root of 151191493 is about 532.7324095892.

The spelling of 151191493 in words is "one hundred fifty-one million, one hundred ninety-one thousand, four hundred ninety-three".