46779981 has 8 divisors (see below), whose sum is σ = 62559744. Its totient is φ = 31093440.

The previous prime is 46779977. The next prime is 46779989. The reversal of 46779981 is 18997764.

46779981 is nontrivially palindromic in base 2.

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

It is not a de Polignac number, because 46779981 - 2² = 46779977 is a prime.

It is a super-2 number, since 2×46779981² = 4376733244720722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (46779989) 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, 22125 + ... + 24146.

It is an arithmetic number, because the mean of its divisors is an integer number (7819968).

Almost surely, 2^46779981 is an apocalyptic number.

It is an amenable number.

46779981 is a deficient number, since it is larger than the sum of its proper divisors (15779763).

46779981 is a wasteful number, since it uses less digits than its factorization.

46779981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46611.

The product of its digits is 762048, while the sum is 51.

The square root of 46779981 is about 6839.5892420525. The cubic root of 46779981 is about 360.3185991302.

The spelling of 46779981 in words is "forty-six million, seven hundred seventy-nine thousand, nine hundred eighty-one".