1420766991 has 24 divisors (see below), whose sum is σ = 2357565600. Its totient is φ = 807653376.

The previous prime is 1420766987. The next prime is 1420767011. The reversal of 1420766991 is 1996670241.

It is not a de Polignac number, because 1420766991 - 2² = 1420766987 is a prime.

It is a super-3 number, since 3×1420766991³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420766911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46266 + ... + 70583.

It is an arithmetic number, because the mean of its divisors is an integer number (98231900).

Almost surely, 2^1420766991 is an apocalyptic number.

1420766991 is a deficient number, since it is larger than the sum of its proper divisors (936798609).

1420766991 is a wasteful number, since it uses less digits than its factorization.

1420766991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117055 (or 117052 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 1420766991 is about 37693.0629028738. The cubic root of 1420766991 is about 1124.1931969402.

The spelling of 1420766991 in words is "one billion, four hundred twenty million, seven hundred sixty-six thousand, nine hundred ninety-one".