46129981 has 8 divisors (see below), whose sum is σ = 48622680. Its totient is φ = 43697472.

The previous prime is 46129943. The next prime is 46129997. The reversal of 46129981 is 18992164.

It can be written as a sum of positive squares in 4 ways, for example, as 783225 + 45346756 = 885^2 + 6734^2 .

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 46129981 - 2²¹ = 44032829 is a prime.

It is a super-2 number, since 2×46129981² = 4255950294120722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (46129921) 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, 13470 + ... + 16543.

It is an arithmetic number, because the mean of its divisors is an integer number (6077835).

Almost surely, 2^46129981 is an apocalyptic number.

It is an amenable number.

46129981 is a deficient number, since it is larger than the sum of its proper divisors (2492699).

46129981 is a wasteful number, since it uses less digits than its factorization.

46129981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30095.

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

The square root of 46129981 is about 6791.9055499911. The cubic root of 46129981 is about 358.6419538895.

The spelling of 46129981 in words is "forty-six million, one hundred twenty-nine thousand, nine hundred eighty-one".