140690469 has 4 divisors (see below), whose sum is σ = 187587296. Its totient is φ = 93793644.

The previous prime is 140690467. The next prime is 140690489. The reversal of 140690469 is 964096041.

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, and also an emirpimes, since its reverse is a distinct semiprime: 964096041 = 3 ⋅321365347.

It is not a de Polignac number, because 140690469 - 2¹ = 140690467 is a prime.

It is a super-2 number, since 2×140690469² = 39587616134879922, 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 (140690467) 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, 23448409 + ... + 23448414.

It is an arithmetic number, because the mean of its divisors is an integer number (46896824).

Almost surely, 2^140690469 is an apocalyptic number.

It is an amenable number.

140690469 is a deficient number, since it is larger than the sum of its proper divisors (46896827).

140690469 is an equidigital number, since it uses as much as digits as its factorization.

140690469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46896826.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 140690469 is about 11861.3013198384. The cubic root of 140690469 is about 520.1016430992.

The spelling of 140690469 in words is "one hundred forty million, six hundred ninety thousand, four hundred sixty-nine".