64972749 has 8 divisors (see below), whose sum is σ = 87003072. Its totient is φ = 43128800.

The previous prime is 64972729. The next prime is 64972763. The reversal of 64972749 is 94727946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64972749 - 2¹⁵ = 64939981 is a prime.

It is a super-2 number, since 2×64972749² = 8442916225234002, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64972698 and 64972707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64972729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45777 + ... + 47174.

It is an arithmetic number, because the mean of its divisors is an integer number (10875384).

Almost surely, 2^64972749 is an apocalyptic number.

It is an amenable number.

64972749 is a deficient number, since it is larger than the sum of its proper divisors (22030323).

64972749 is a wasteful number, since it uses less digits than its factorization.

64972749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93187.

The product of its digits is 762048, while the sum is 48.

The square root of 64972749 is about 8060.5675358501. The cubic root of 64972749 is about 402.0163788777.

The spelling of 64972749 in words is "sixty-four million, nine hundred seventy-two thousand, seven hundred forty-nine".