986811631 has 8 divisors (see below), whose sum is σ = 1125233424. Its totient is φ = 857320320.

The previous prime is 986811613. The next prime is 986811643. The reversal of 986811631 is 136118689.

It is a happy number.

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 986811631 - 2⁵ = 986811599 is a prime.

It is a super-2 number, since 2×986811631² = 1947594390153760322, 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 (986811131) 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, 2232385 + ... + 2232826.

It is an arithmetic number, because the mean of its divisors is an integer number (140654178).

Almost surely, 2^986811631 is an apocalyptic number.

986811631 is a deficient number, since it is larger than the sum of its proper divisors (138421793).

986811631 is a wasteful number, since it uses less digits than its factorization.

986811631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4465241.

The product of its digits is 62208, while the sum is 43.

The square root of 986811631 is about 31413.5580760919. The cubic root of 986811631 is about 995.5844082471.

It can be divided in two parts, 98681 and 1631, that multiplied together give a triangular number (160948711 = T₁₇₉₄₁).

The spelling of 986811631 in words is "nine hundred eighty-six million, eight hundred eleven thousand, six hundred thirty-one".