1210988623 has 4 divisors (see below), whose sum is σ = 1304141608. Its totient is φ = 1117835640.

The previous prime is 1210988599. The next prime is 1210988627. The reversal of 1210988623 is 3268890121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210988623 is a prime.

It is a super-2 number, since 2×1210988623² = 2932986890070872258, 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 (1210988627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46576473 + ... + 46576498.

It is an arithmetic number, because the mean of its divisors is an integer number (326035402).

Almost surely, 2^1210988623 is an apocalyptic number.

1210988623 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1210988623 is a deficient number, since it is larger than the sum of its proper divisors (93152985).

1210988623 is an equidigital number, since it uses as much as digits as its factorization.

1210988623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93152984.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 1210988623 is about 34799.2618168834. The cubic root of 1210988623 is about 1065.8923723307.

The spelling of 1210988623 in words is "one billion, two hundred ten million, nine hundred eighty-eight thousand, six hundred twenty-three".