72890619 has 4 divisors (see below), whose sum is σ = 97187496. Its totient is φ = 48593744.

The previous prime is 72890603. The next prime is 72890621. The reversal of 72890619 is 91609827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91609827 = 3 ⋅30536609.

It is a cyclic number.

It is not a de Polignac number, because 72890619 - 2⁴ = 72890603 is a prime.

It is a super-2 number, since 2×72890619² = 10626084676406322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72890639) 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, 12148434 + ... + 12148439.

It is an arithmetic number, because the mean of its divisors is an integer number (24296874).

Almost surely, 2^72890619 is an apocalyptic number.

72890619 is a deficient number, since it is larger than the sum of its proper divisors (24296877).

72890619 is a wasteful number, since it uses less digits than its factorization.

72890619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24296876.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 72890619 is about 8537.6003068778. The cubic root of 72890619 is about 417.7250754314.

The spelling of 72890619 in words is "seventy-two million, eight hundred ninety thousand, six hundred nineteen".