72940769 has 4 divisors (see below), whose sum is σ = 79571760. Its totient is φ = 66309780.

The previous prime is 72940759. The next prime is 72940793. The reversal of 72940769 is 96704927.

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 72940769 - 2²⁴ = 56163553 is a prime.

It is a super-2 number, since 2×72940769² = 10640711564622722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72940739) 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, 3315479 + ... + 3315500.

It is an arithmetic number, because the mean of its divisors is an integer number (19892940).

Almost surely, 2^72940769 is an apocalyptic number.

It is an amenable number.

72940769 is a deficient number, since it is larger than the sum of its proper divisors (6630991).

72940769 is a wasteful number, since it uses less digits than its factorization.

72940769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6630990.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 72940769 is about 8540.5368098264. The cubic root of 72940769 is about 417.8208541487.

The spelling of 72940769 in words is "seventy-two million, nine hundred forty thousand, seven hundred sixty-nine".