64949131 has 4 divisors (see below), whose sum is σ = 69945232. Its totient is φ = 59953032.

The previous prime is 64949119. The next prime is 64949141. The reversal of 64949131 is 13194946.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64949131 - 2¹¹ = 64947083 is a prime.

It is a super-2 number, since 2×64949131² = 8436779235310322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64949111) 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, 2498031 + ... + 2498056.

It is an arithmetic number, because the mean of its divisors is an integer number (17486308).

Almost surely, 2^64949131 is an apocalyptic number.

64949131 is a deficient number, since it is larger than the sum of its proper divisors (4996101).

64949131 is a wasteful number, since it uses less digits than its factorization.

64949131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4996100.

The product of its digits is 23328, while the sum is 37.

The square root of 64949131 is about 8059.1023693709. The cubic root of 64949131 is about 401.9676611528.

It can be divided in two parts, 6494 and 9131, that added together give a 6-th power (15625 = 5⁶).

The spelling of 64949131 in words is "sixty-four million, nine hundred forty-nine thousand, one hundred thirty-one".