72957869 has 2 divisors, whose sum is σ = 72957870. Its totient is φ = 72957868.

The previous prime is 72957809. The next prime is 72957883. The reversal of 72957869 is 96875927.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60248644 + 12709225 = 7762^2 + 3565^2 .

It is a cyclic number.

It is not a de Polignac number, because 72957869 - 2¹² = 72953773 is a prime.

It is a super-2 number, since 2×72957869² = 10645701298042322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72957869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72957809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36478934 + 36478935.

It is an arithmetic number, because the mean of its divisors is an integer number (36478935).

Almost surely, 2^72957869 is an apocalyptic number.

It is an amenable number.

72957869 is a deficient number, since it is larger than the sum of its proper divisors (1).

72957869 is an equidigital number, since it uses as much as digits as its factorization.

72957869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 53.

The square root of 72957869 is about 8541.5378591914. The cubic root of 72957869 is about 417.8535024579.

The spelling of 72957869 in words is "seventy-two million, nine hundred fifty-seven thousand, eight hundred sixty-nine".