61812949 has 8 divisors (see below), whose sum is σ = 69757920. Its totient is φ = 54255600.

The previous prime is 61812931. The next prime is 61812967. The reversal of 61812949 is 94921816.

It is an interprime number because it is at equal distance from previous prime (61812931) and next prime (61812967).

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 61812949 - 2¹¹ = 61810901 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61812749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96567 + ... + 97204.

It is an arithmetic number, because the mean of its divisors is an integer number (8719740).

Almost surely, 2^61812949 is an apocalyptic number.

It is an amenable number.

61812949 is a deficient number, since it is larger than the sum of its proper divisors (7944971).

61812949 is a wasteful number, since it uses less digits than its factorization.

61812949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193811.

The product of its digits is 31104, while the sum is 40.

The square root of 61812949 is about 7862.1211514451. The cubic root of 61812949 is about 395.3907344386.

The spelling of 61812949 in words is "sixty-one million, eight hundred twelve thousand, nine hundred forty-nine".