1407699991 has 4 divisors (see below), whose sum is σ = 1456241400. Its totient is φ = 1359158584.

The previous prime is 1407699983. The next prime is 1407700009. The reversal of 1407699991 is 1999967041.

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

It is a cyclic number.

It is not a de Polignac number, because 1407699991 - 2³ = 1407699983 is a prime.

It is a super-2 number, since 2×1407699991² = 3963238529322800162, 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 (1407699971) 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, 24270661 + ... + 24270718.

It is an arithmetic number, because the mean of its divisors is an integer number (364060350).

Almost surely, 2^1407699991 is an apocalyptic number.

1407699991 is a deficient number, since it is larger than the sum of its proper divisors (48541409).

1407699991 is an equidigital number, since it uses as much as digits as its factorization.

1407699991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48541408.

The product of its (nonzero) digits is 1102248, while the sum is 55.

The square root of 1407699991 is about 37519.3282322592. The cubic root of 1407699991 is about 1120.7361208293.

The spelling of 1407699991 in words is "one billion, four hundred seven million, six hundred ninety-nine thousand, nine hundred ninety-one".