72619969 has 4 divisors (see below), whose sum is σ = 72766000. Its totient is φ = 72473940.

The previous prime is 72619961. The next prime is 72619999. The reversal of 72619969 is 96991627.

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: 96991627 = 983 ⋅98669.

It is a cyclic number.

It is not a de Polignac number, because 72619969 - 2³ = 72619961 is a prime.

It is a super-2 number, since 2×72619969² = 10547319795121922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72619961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72267 + ... + 73264.

It is an arithmetic number, because the mean of its divisors is an integer number (18191500).

Almost surely, 2^72619969 is an apocalyptic number.

It is an amenable number.

72619969 is a deficient number, since it is larger than the sum of its proper divisors (146031).

72619969 is a wasteful number, since it uses less digits than its factorization.

72619969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146030.

The product of its digits is 367416, while the sum is 49.

The square root of 72619969 is about 8521.7350932777. The cubic root of 72619969 is about 417.2074161701.

The spelling of 72619969 in words is "seventy-two million, six hundred nineteen thousand, nine hundred sixty-nine".