61926981 has 8 divisors (see below), whose sum is σ = 83732544. Its totient is φ = 40703040.

The previous prime is 61926979. The next prime is 61926983. The reversal of 61926981 is 18962916.

It is an interprime number because it is at equal distance from previous prime (61926979) and next prime (61926983).

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

It is not a de Polignac number, because 61926981 - 2¹ = 61926979 is a prime.

It is a super-2 number, since 2×61926981² = 7669901951548722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61926983) 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, 145156 + ... + 145581.

It is an arithmetic number, because the mean of its divisors is an integer number (10466568).

Almost surely, 2^61926981 is an apocalyptic number.

It is an amenable number.

61926981 is a deficient number, since it is larger than the sum of its proper divisors (21805563).

61926981 is a wasteful number, since it uses less digits than its factorization.

61926981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290811.

The product of its digits is 46656, while the sum is 42.

The square root of 61926981 is about 7869.3697968770. The cubic root of 61926981 is about 395.6337228947.

The spelling of 61926981 in words is "sixty-one million, nine hundred twenty-six thousand, nine hundred eighty-one".