149162691 has 4 divisors (see below), whose sum is σ = 198883592. Its totient is φ = 99441792.

The previous prime is 149162683. The next prime is 149162701. The reversal of 149162691 is 196261941.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 149162691 - 2³ = 149162683 is a prime.

It is a super-2 number, since 2×149162691² = 44499016772722962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149162681) 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, 24860446 + ... + 24860451.

It is an arithmetic number, because the mean of its divisors is an integer number (49720898).

Almost surely, 2^149162691 is an apocalyptic number.

149162691 is a deficient number, since it is larger than the sum of its proper divisors (49720901).

149162691 is an equidigital number, since it uses as much as digits as its factorization.

149162691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49720900.

The product of its digits is 23328, while the sum is 39.

The square root of 149162691 is about 12213.2178806406. The cubic root of 149162691 is about 530.3388020056.

The spelling of 149162691 in words is "one hundred forty-nine million, one hundred sixty-two thousand, six hundred ninety-one".