147137991 has 48 divisors (see below), whose sum is σ = 264925440. Its totient is φ = 70536960.

The previous prime is 147137983. The next prime is 147137999. The reversal of 147137991 is 199731741.

It is an interprime number because it is at equal distance from previous prime (147137983) and next prime (147137999).

It is not a de Polignac number, because 147137991 - 2³ = 147137983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147137999) 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 47 ways as a sum of consecutive naturals, for example, 37155 + ... + 40923.

It is an arithmetic number, because the mean of its divisors is an integer number (5519280).

Almost surely, 2^147137991 is an apocalyptic number.

147137991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

147137991 is a deficient number, since it is larger than the sum of its proper divisors (117787449).

147137991 is a wasteful number, since it uses less digits than its factorization.

147137991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3816 (or 3803 counting only the distinct ones).

The product of its digits is 47628, while the sum is 42.

The square root of 147137991 is about 12130.0449710626. The cubic root of 147137991 is about 527.9282967656.

It can be divided in two parts, 1471379 and 91, that added together give a triangular number (1471470 = T₁₇₁₅).

The spelling of 147137991 in words is "one hundred forty-seven million, one hundred thirty-seven thousand, nine hundred ninety-one".