72049429 has 2 divisors, whose sum is σ = 72049430. Its totient is φ = 72049428.

The previous prime is 72049421. The next prime is 72049433. The reversal of 72049429 is 92494027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70946929 + 1102500 = 8423^2 + 1050^2 .

It is a cyclic number.

It is not a de Polignac number, because 72049429 - 2³ = 72049421 is a prime.

It is a super-2 number, since 2×72049429² = 10382240438452082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72049421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36024714 + 36024715.

It is an arithmetic number, because the mean of its divisors is an integer number (36024715).

Almost surely, 2^72049429 is an apocalyptic number.

It is an amenable number.

72049429 is a deficient number, since it is larger than the sum of its proper divisors (1).

72049429 is an equidigital number, since it uses as much as digits as its factorization.

72049429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 72049429 is about 8488.1935062768. The cubic root of 72049429 is about 416.1119432622. Note that the first 3 decimals are identical.

The spelling of 72049429 in words is "seventy-two million, forty-nine thousand, four hundred twenty-nine".