72343669 has 4 divisors (see below), whose sum is σ = 73882944. Its totient is φ = 70804396.

The previous prime is 72343643. The next prime is 72343693. The reversal of 72343669 is 96634327.

72343669 = T₁₇₃₁ + T₁₇₃₂ + ... + T₁₇₇₇.

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 not a de Polignac number, because 72343669 - 2⁵ = 72343637 is a prime.

It is a super-2 number, since 2×72343669² = 10467212888763122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72343699) 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, 769567 + ... + 769660.

It is an arithmetic number, because the mean of its divisors is an integer number (18470736).

Almost surely, 2^72343669 is an apocalyptic number.

It is an amenable number.

72343669 is a deficient number, since it is larger than the sum of its proper divisors (1539275).

72343669 is a wasteful number, since it uses less digits than its factorization.

72343669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539274.

The product of its digits is 163296, while the sum is 40.

The square root of 72343669 is about 8505.5081564831. The cubic root of 72343669 is about 416.6776219697.

The spelling of 72343669 in words is "seventy-two million, three hundred forty-three thousand, six hundred sixty-nine".