149291939669 has 8 divisors (see below), whose sum is σ = 149819493528. Its totient is φ = 148765317120.

The previous prime is 149291939659. The next prime is 149291939759. The reversal of 149291939669 is 966939192941.

It can be written as a sum of positive squares in 4 ways, for example, as 37689174769 + 111602764900 = 194137^2 + 334070^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 149291939669 - 2⁴ = 149291939653 is a prime.

It is a super-2 number, since 2×149291939669² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 149291939599 and 149291939608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149291939659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89129 + ... + 553649.

It is an arithmetic number, because the mean of its divisors is an integer number (18727436691).

Almost surely, 2^149291939669 is an apocalyptic number.

It is an amenable number.

149291939669 is a deficient number, since it is larger than the sum of its proper divisors (527553859).

149291939669 is an equidigital number, since it uses as much as digits as its factorization.

149291939669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465655.

The product of its digits is 51018336, while the sum is 68.

The spelling of 149291939669 in words is "one hundred forty-nine billion, two hundred ninety-one million, nine hundred thirty-nine thousand, six hundred sixty-nine".