1220079631 has 2 divisors, whose sum is σ = 1220079632. Its totient is φ = 1220079630.

The previous prime is 1220079583. The next prime is 1220079701. The reversal of 1220079631 is 1369700221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220079631 is a prime.

It is a super-2 number, since 2×1220079631² = 2977188611962192322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220079593 and 1220079602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220079031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610039815 + 610039816.

It is an arithmetic number, because the mean of its divisors is an integer number (610039816).

Almost surely, 2^1220079631 is an apocalyptic number.

1220079631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220079631 is an equidigital number, since it uses as much as digits as its factorization.

1220079631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 1220079631 is about 34929.6382889946. The cubic root of 1220079631 is about 1068.5529777554.

Adding to 1220079631 its reverse (1369700221), we get a palindrome (2589779852).

The spelling of 1220079631 in words is "one billion, two hundred twenty million, seventy-nine thousand, six hundred thirty-one".