151946491 has 2 divisors, whose sum is σ = 151946492. Its totient is φ = 151946490.

The previous prime is 151946489. The next prime is 151946503. The reversal of 151946491 is 194649151.

151946491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (194649151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 151946491 - 2¹ = 151946489 is a prime.

It is a super-2 number, since 2×151946491² = 46175472254426162, which contains 22 as substring.

Together with 151946489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (151946471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75973245 + 75973246.

It is an arithmetic number, because the mean of its divisors is an integer number (75973246).

Almost surely, 2^151946491 is an apocalyptic number.

151946491 is a deficient number, since it is larger than the sum of its proper divisors (1).

151946491 is an equidigital number, since it uses as much as digits as its factorization.

151946491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 40.

The square root of 151946491 is about 12326.6577384139. The cubic root of 151946491 is about 533.6176980506.

The spelling of 151946491 in words is "one hundred fifty-one million, nine hundred forty-six thousand, four hundred ninety-one".