132969781 has 10 divisors (see below), whose sum is σ = 155124982. Its totient is φ = 113972040.

The previous prime is 132969769. The next prime is 132969787. The reversal of 132969781 is 187969231.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 131469156 + 1500625 = 11466^2 + 1225^2 .

It is not a de Polignac number, because 132969781 - 2¹¹ = 132967733 is a prime.

It is a super-2 number, since 2×132969781² = 35361925318375922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (132969787) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 25290 + ... + 30091.

Almost surely, 2^132969781 is an apocalyptic number.

It is an amenable number.

132969781 is a deficient number, since it is larger than the sum of its proper divisors (22155201).

132969781 is an frugal number, since it uses more digits than its factorization.

132969781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55409 (or 55388 counting only the distinct ones).

The product of its digits is 163296, while the sum is 46.

The square root of 132969781 is about 11531.2523604334. The cubic root of 132969781 is about 510.4082096377.

The spelling of 132969781 in words is "one hundred thirty-two million, nine hundred sixty-nine thousand, seven hundred eighty-one".