148689786997 has 4 divisors (see below), whose sum is σ = 156515565280. Its totient is φ = 140864008716.

The previous prime is 148689786977. The next prime is 148689787007. The reversal of 148689786997 is 799687986841.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-148689786997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 148689786997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148689786937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3912889113 + ... + 3912889150.

It is an arithmetic number, because the mean of its divisors is an integer number (39128891320).

Almost surely, 2^148689786997 is an apocalyptic number.

It is an amenable number.

148689786997 is a deficient number, since it is larger than the sum of its proper divisors (7825778283).

148689786997 is an equidigital number, since it uses as much as digits as its factorization.

148689786997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7825778282.

The product of its digits is 2633637888, while the sum is 82.

The spelling of 148689786997 in words is "one hundred forty-eight billion, six hundred eighty-nine million, seven hundred eighty-six thousand, nine hundred ninety-seven".